After you have removed a majority of the dust with the shop vacuum, use a tack cloth or a cotton rag that has been dipped in water and thoroughly squeezed out to remove the remainder of the dust. Denatured alcohol will raise the grain a little, so you’ll have to sand it smooth again. Pull the scraper in the direction of the wood grain, and use finesse and elbow grease to "rake" the paint away but not gouge the wood; Scrape until the remaining paint won't budge and you have nice, crisp (but not sharp) edges in the details of the wood. Unquestionably, the most efficient progression is to sand through every grit – #80, #100, #120, #150, #180 – sanding just enough with each to remove the scratches of the previous grit. But most of us sand more than we need to, so it’s often more efficient to skip grits. Photo 5: Mark imperfections in the wall. This allows the paint to grip the surface, especially with anything that’s varnished. Yes, you can paint over stained wood without sanding, as paint can adhere to stain. I made my own sanding block. You can finish-sand both of these surfaces with #180 grit, for example, but you might begin with #80 grit on the solid wood and #120 grit on the plywood. How to get a Smooth Finish with Wet Sanding. Put on eye protection and rubber gloves. It would be a total waste of time and effort to begin with #80 grit on the pre-sanded veneered wood (and you would risk sanding through). “The problem with sanding down to the wood is that it creates the potential for moisture to seep in or out of the wood,” says Chris. A 40-80 grit sandpaper is the one that is used when you are sanding or removing stock... Understanding the importance of sanding. Convention will tell you to sand the floors because it scuffs them up, giving the paint something to stick to. Start with a coarse aluminum oxide or garnet sandpaper and end with a finer (80, 120, 180, 220) sandpaper. Sanding by hand in the direction of the grain to remove these squigglies then becomes unnecessary. The finer you sand, the less stain color will be retained on the wood when you wipe off the excess. Note: A coarser-grit paper will remove more than necessary (use 80- to 120-grit to smooth imperfections such as heavy globs of old paint). Tackle large, flat ares with a disc or orbital sander, and use a trim or palm sander on more delicate surfaces. If you can’t avoid cross-grain sanding, you will have to find a compromise between creating scratches fine enough so they don’t show and coarse enough so the stain still darkens the wood adequately. Hand-sand all woodwork smooth with a fine, 180-grit paper until all shine disappears. Roll the paint up and down the slope of the tray a few times to distribute the paint on the roller pad. The scratching that does occur is then more likely to be disguised by the grain of the wood. Cross-grain sanding scratches aren’t very visible under a clear finish, but they show up very clearly under a stain. Sanding the first paint coat brings down bumps and inconsistencies introduced by the roller or brush. Using 220-grit sandpaper, sand gently by hand, or attach the paper to the orbital sander and run it extremely lightly across the surface. 2. Go a step further and apply a clear polyurethane over the painted surface to help protect the paint, as well as the underlying wood. Here is a guide to help you distress wood with sandpaper. A brush kicks the dust up in the air to dirty your shop and possibly land back on your work during finishing. In this case, the top half was sanded to #180 grit and the bottom half to #600 grit. It’s not necessary to get all the dust out of the pores. For wetting the wood, use mineral spirits (paint thinner) or denatured alcohol. You should practice first on scrap wood to determine where this point is for you. The appearance and feel of the finish is all its own and has nothing any longer to do with how fine you sand the wood. Sand with the folded sandpaper until it dulls, flip the folded sandpaper over to use the second third, then refold to use the third third. Sand with the grain to avoid ripping the wood fibres. If you routinely apply sanding sealer before finishing, you may be taking an extra, unnecessary step. Roll the paint onto the wood, beginning with light pressure only. Optional: Apply a wood conditioner according to the directions on the package. If the outside paint layer is gummy, use a “clog-resistant,” or “self-lubricating,” sandpaper (such as 3M's SandBlaster paper). There are times that I will recommend sanding before painting. The process is called sanding because the main element used for wearing out the fibers is sand. Distressing painted wood is easy when you have the right tools. Sand the surface to 320-grit. 1. Painting wood appears to be such an elemental, foolproof project that many people rush the job along or attempt shortcuts that produce poor results. For surfaces that have large, flat areas, incorporating a high-density foam roller will help you get the job done more quickly. Kudos to Bob! However, this does not impact our recommendations. Here is a most common way to distress painted wood: using sandpaper. Wipe the surface of the entire table using the tack cloth. This allows the paint to grip … in a kitchen than, say, a bedroom where you may want to paint a wooden dresser. Put on eye protection and rubber gloves. Once you are planning to paint wood trimmings, furniture or … Sanding also removes burrs and rough spots in painted wood trim, such as baseboard moldings, and window and door casings. Thoroughly remove the sanding dust from all surfaces. Here's how.1. Wood Trim and Siding. Wet sanding will remove orange peal, improving the clarity and imagine in the paint. The dream of a glass-smooth tabletop is always spoiled by brush marks and bits of dust and other debris. The objective of sanding wood is to remove mill marks, which are caused by woodworking machines, and to remove other flaws such as dents and gouges that may have been introduced in handling. Use very fine 220-grit sandpaper, and apply light pressure to prevent gouging the primer. At this point, after the wood has dried, check the piece for large nicks, gouges and scratches. Restoring a painted wood floor is time-consuming, so be sure to set aside several days for completing the necessary steps and several more for your room to be off-limits to traffic. When you have used up one side, turn the folded sandpaper and use the other. Lay a canvas drop cloth or contractor's paper over the plastic sheeting. It will also help remove foreign contaminants which maybe on the surface in the paint along with runs, overspray, and … ), but sanding it first can be a real pain. Apply Paint Color; Step 1 - Sand Your Wood Thoroughly. Of course, doing this is seldom possible on turnings and decorative veneer patterns such as sunbursts and marquetry. In the following articles, learn how to sand wood through a variety of methods, from hand sanding to using specific types of power sanders. (wet sanding and applying clear sealer) … If you are sanding critical flat surfaces by hand, you should always use a flat block to back the sandpaper. The most efficient use of sandpaper for hand-backed sanding is to tear the 9″ x 11″ sheet of sandpaper into thirds crossways, then fold each of these pieces into thirds lengthways. Sand. Fine sandpapers range from 120- to 220-grit. Sand Your Primer. As in the example mentioned above, if you're working with a rough piece of wood like palette wood or old, worn-out wood, make sure you put it through several grits of sandpaper … For both of these sanders, however, there are two critical rules to follow. Zirconia alumina is suitable for wood, fiberglass, metal and painted surfaces. For most of us, finishing means applying varnish, polyurethane, or paint with a brush. Using your hand to back the sandpaper can lead to hollowing out the softer early-wood grain on most woods. This is a very important concept because it gets past all the contradictory instructions about which sandpaper grits to use. Sanding Furniture to Paint What to Sand With . Mix the primer well and apply it with a brush or roller. Fine sanding. Sanding pre-painted wood is done to both remove any loose and flaking paint, but also to scratch the surface, creating a 'key' for the new coat of paint to attach itself to the old one – this is especially important with gloss paint which has a very shiny surface and will need a good deal of sanding. Tip: Use 80-grit if you are sanding a furnishing with an existing varnish. Then, apply a layer of Oil Bond on to the cleaned surface. Starting first with this Ranger that I repaired the cab corner on. Save up to 68% on 7 issues of woodworking projects and tricks. Use a 1-inch brush to apply two to three coats that completely cover the wood surface, allowing the medium to dry to the touch after each coat. Then finish-sand with 180-grit sandpaper or a fine sanding sponge. 3. Wet sanding is a great way to improve a good paint job and can even be used to help improve the quality of a poorly laid paid layer. Transfer the roller to the wood. High-density foam roller covers tend to trap paint in the roller pad, so you may have to gently increase pressure to release the paint. Sandpaper. Truth is, any film-forming finish works as a "sealer" because it closes off the pores of the wood and lays a base for the topcoats. But there are two methods you can use as an aid. This will take the … Sandpaper and power sanders provide another quick way to remove old Second, it’s always the best policy to sand out the squigglies by hand after you have progressed to your final sanding grit (for example, #180 or #220), especially if you are applying a stain. This is a step that cannot be avoided, even if you're repainting a piece of wood. Pretty much just like painting with the wood grain – paint with the previous paint strokes. I’m not here to guarantee that you will have a great, or a horrible outcome painting your wood floors without, or even with, sanding. Dab the end of the paintbrush bristles only about 1/4-inch into the paint each time you load the brush. What Grit Sandpaper for Wood Before Painting? Sanding Wood That was Previously Painted If your wood has been previously painted you will typically sand but not necessarily to fix issues with raised grain but to help promote adhesion. Kelly Bacon is a licensed general contractor with almost 50 years experience in construction, home building and remodeling, and commercial building. Apply a coat of wood conditioner to open grained wood such as pine or fir. It’s a life changing product that has been around for years, but I just never noticed it nestled in on the shelf at the home improvement store. How to Apply a Paint Finish to Wood ProjectsHow to Apply This Finish1. Thoroughly remove sand… I refer to these as “squigglies.” The best policy is to sand them out by hand in the direction of the grain after sanding to the finest grit, usually #180 or #220, with the sander. Liquid sandpaper dulls a glossy surface, with far less effort! You can then sand the entire surface to give it a more textured surface that your paint will easily stick to. It’s a great alternative to sandpaper that provides that same “rough” surface for paint to adhere. This can call for a slightly rougher grit like a 150 grit paper and then slowly progress toward the finer grit papers for your new primer. Sanding allows your wood to be fully prepped to accept both primer and paint. Splatters!) Do not add a second coat of paint during this step, as this can cause the paint to tear. Gently dab the roller into the paint. Bob Flexner is the author of "Flexner on Finishing," "Wood Finishing 101," and "Understanding Wood Finishing. Some painters skip this step, but it depends on the type of paneling you’re painting. If anything is more important, it is to clean the surface thoroughly after sanding as the process accumulates a lot of dust. Instead, use a tack cloth, a sticky piece of cheesecloth made especially for this purpose. If the piece you are painting has any rough spots, like let’s say you’re painting new wood, then you need to sand those spots smooth before painting as well. You'll find it in the form of belts, pads and discs for power-sanding. Dry rags or brushes aren't the most effective tools for removing dust. Next, sand the table with the 150-grit paper, and finish by sanding with the 220-grit paper. This is an excellent entry level sanding article! Sand to Finish Photo by Wendell T. Webber. But these finishes can be made ultimately smooth simply by sanding between cured coats or sanding each additional coat while it is still wet on the surface using #400- or #600-grit sandpaper. 1. Once you master these wood sanding techniques, you'll be able to prep your projects for a great finish. Distressing wood 101. Then a stain was applied and the excess wiped off. Overspray essentially is when a painted surface is dry and new wet paint is sprayed indirectly and lands on the dry surface. Be careful not to gouge the surface though: You're just looking to rough it up a little so the primer has something to adhere to; you're not trying to strip the surface. Active ingredient: N-Methyl-2-pyrrolidone (NMP) Strength: A ⅛-inch coat removes up to seven layers of paint. So you don’t want to begin with too coarse a grit because it will cause you more work than necessary sanding out the scratches. Some situations, however, benefit from a sealer. Keep a wet edge at all times to prevent lap marks. Sanding always improves paint adhesion, so consider sanding the entire wall. Using a medium-grit sanding sponge, scuff corners, edges, and details where the piece would naturally show wear, letting the underlayer of paint—and even a bit of raw wood—peek through in spots. To get paint to adhere to wood, you have to sand it, to rough up the surface. Be sure to start any painting project by sanding your surfaces with 150-grit sandpaper. A fresh coat of paint can give almost any wooden piece, such as furniture, cabinets or room trim, a much needed face-lift. Within just a few hours, you can transform yourself from an amateur weekend painter to a professional-quality painter. First paint the wood. The sanding scratches won’t show as long as they are in the direction of the grain. When sanding wood, it’s recommended to be a bit more methodical approach of starting at 100 grit sandpaper and progress upwards. Whether you're a beginner or you're a regular do-it-yourselfer, our checklist will take your paint job from "good" to "amazing." (I find the rubber sanding blocks, available at home centers, too hard, wasteful of sandpaper and inefficient because of the time involved in changing sandpapers.). If necessary, fill them with a wood filler using a flexible putty knife. Wait two days to allow the paint to dry completely. Being sure that these flaws and scratches are removed is the reason most of us sand more than we need to. Sanding using sandpaper is one of the most popular ways to age wood. Moisture and wood can obviously be a bad combination. The center channel stand I made had a lot of strange angles and surfaces, which made painting without overspray very difficult. Get the Right Gear. It’s a lot easier doing this than sanding the wood through all the grits to #400 or #600. Cross-grain. Step down your grits and finish with an ultra-fine grit. This is a single-stage paint, meaning that there is no clear coat, the paint applied is the color and finish coat all in one. You can opt-out at any time. For highly irregular surfaces, such as furniture, crown molding, and trim, it is best to use a paintbrush only. Indeed, some have enough power to run a 36-grit floor sanding disc, which could save you from renting floor-specific sanding equipment when refinishing wood floors. A lot of knowing when you have sanded enough is learned by experience. Sanding is very personal. Vacuum sanding dust and debris around the area where you'll apply the paint, especially the floor and overhead lights. However, for the best results, you should use the primer or Oil Bond method to clean the area you want to paint using a rag. Simply move the sander slowly over the surface of the wood in some pattern that covers all areas approximately equally. Start with a rough sandpaper grit, such as 80 grit, and begin to sand the wood. Painting wood furniture has to be one of the best ways to transform it on a dime (hello, flea market finds! The most efficient method of doing this is to begin sanding with a coarse enough grit of sandpaper to cut through and remove the problems quickly, then sand out the coarse-grit scratches with finer and finer grits until you reach the smoothness you want – usually up to #150, #180 or #220 grit. Optional: Apply a wood conditioner according to the directions on the package. We all sand with different pressures, number of passes over any given spot and lengths of time. Sanding block. Make sure to eliminate all ridges. Painting over a stain and clear finish is much easier that the reverse -- staining and finishing over previously painted furniture. Clean the Wood Surfaces. Get it free when you sign up for our newsletter. While sanding a wall or a wood surface (like of your old furniture) can be a bit of hassle and time consuming, the process can be made easier if you make use of a right sander device for your project. Avoid mineral spirits if you are going to apply a water-based finish because any oily residue from the thinner might cause the finish to bead up. Primary sanding of rough wood and the removal of planning marks on wood is often best done with medium-grit sandpaper. Before staining or painting, sanding is very important; otherwise, they would not stick to the wood properly. Doing this is especially important if you are staining. Sometimes with vibrator and random-orbit sanders, sanding up to #220 grit makes the squiggly marks left by these sanders small enough so they aren’t seen under a clear finish. Second, wet the wood then look at it from different angles into a reflected light. The primer will have a chalky feel and appearance but this will be smoothed over by the paint. Painted exterior wood surfaces should be sanded with power sanders. I love this gently weathered wood look! Sand your furniture piece smooth. You’ll have to learn by experience what works best for you. A fresh coat of paint can give almost any wooden piece, such as furniture, cabinets or room trim, a much needed face-lift. Do not apply pressure to the sander other than the weight of the sander itself. After the paint dries a few minutes and before the paint dries completely, take a scraper or credit card, and scrape off some paints at random spots. Overspray essentially is when a painted surface is dry and new wet paint … To remove those last bits of finish, palm sand with medium sandpaper (150 grit) until you see the bare wood. Sand the painted surface with 100- or 120-grit sandpaper or a medium sanding sponge. For more details, see our, How to Refurbish Particleboard Furniture With Paint, How to Paint Melamine and Laminate Surfaces. Hearing protection is essential when operating the oscillating sander. Introducing "One Thing": A New Video Series, Roller assembly with a high-density foam cover, Paint additive such as Penetrol or Floetrol (optional). When to Sand, Before Painting? Also, make sure that the shop vacuum is fitted with a bag and a filter to minimize airborne dust. The plastic keeps the paint from soaking through to the floor, while the canvas provides a non-slip surface and helps to contain paint spills. The difference is that sanding removes more paint and wood, and can expose the raw wood. Film-building finishes, such as varnish, shellac, lacquer and water-based finish, create their own surfaces after a couple of coats. Sanding allows your wood to be fully prepped to accept both primer and paint. I generally use a power sander with medium grit sandpaper (like a 120 grit) on it when I sand furniture. First, don’t press down on the sander when sanding. Click here to Pin this post for later. Electric sanders. Home Wood and Supplies Sanding and Abrasives. Other than using a stationary sanding machine or a belt sander, which will take a good deal of practice to learn to control, there are three methods of sanding wood: with just your hand backing the sandpaper, with a flat block backing the sandpaper and with a vibrator or random-orbit sander. Paint becomes more durable after it fully cures. Mix a solution of TSP with warm water to the proportions recommended by the manufacturer. To prepare previously painted wood, strip off cracking, flaking, or chipping paint, sand the surface with 180-grit sandpaper, remove the dust, and wipe with a damp sponge. With that said, picking the right set of power tools can be quite challenging, especially for a nerd. Find Paint Products Sand All Surfaces to Remove the Shine. Floor work is a hands-and-knees endeavor, so invest in knee pads. Sand the Flat Areas. In all cases when sanding by hand, it’s best to sand in the direction of the wood grain when possible. Once the surface is clean, patch any holes or cracks with a wood filler. Filter mask. Painting wood furniture has to be one of the best ways to transform it on a dime (hello, flea market finds! Then, apply a layer of Oil Bond on to the cleaned surface. And that rationale makes sense. Many people tend to skip a grit of paper looking to save a bit of time, but believe me when we say this, this isn’t a good idea. Here is a quick video to show you how. Dip a cloth in the water, firmly squeeze it dry, then wipe down the wood to remove all oils, dirt, and grime. Oil and oil/varnish-blend finishes have no measurable build, so any roughness in the wood caused by coarse sanding telegraphs through. Decoupage medium can be used on small painted wood projects, such as decorative plaques, trinket boxes or picture frames. Wipe the surface of the entire table using the tack cloth. I used sugar pine because it is very light in weight. Spot-prime the filler and any bare wood. If the block is hard (wood, for example), it’s best to have some sort of softer material such as cork glued to the bottom to improve the performance of the sandpaper. Wet-sanding also helps to prevent the sandpaper from clogging with dust, remove loose abrasive particles and reduce airborne dust. Sanding and polishing clear coat overspray. Too much pressure on the tack cloth will be counter-productive, as this will press the tack cloth's embedded wax onto the surface. Sanding and polishing clear coat overspray. Any wood will work. Sanding can be a tedious process, but it is vital to the overall quality of the woodworking project. Sanding wooden surfaces . Use a light touch, work on a large area, and keep the sander constantly moving to prevent gouging the wood or creating visible waves. That said, in my experience thus far (at the time of writing this post my floors have been painted for four months), painting without sanding has worked just fine… If it isn’t, there’s no point going past #180 grit. https://www.popularwoodworking.com/techniques/rules_for_sanding_wood Unless all traces of sawdust and sanding dust are first removed, any finish you apply—whether it is a coat of paint or stain-plus-topcoat—is doomed to be imperfect.Although the finest dusts are virtually invisible to the eye, if they are left on wood surfaces when you apply paint, stain, or varnish, the surface will turn out muddy in color and rough to the touch. Its measurements are 2 3/4″ x 3 7/8″ x 1 1/4″ thick, with the top edges chamfered for a more comfortable grip. Start with a medium grit if needed. Sand the project up through the grits to150-grita. The objective of sanding wood is to remove mill marks, which are caused by woodworking machines, and to remove other flaws such as dents and gouges that may have been introduced in handling. Subscribe ». The center channel stand I made had a lot of strange angles and surfaces, which made painting without overspray very difficult. (I use this orbital sander with variable speeds.) Random-orbit sanders are more efficient than vibrator sanders, but they still leave cross-grain marks in the wood. But for those willing to take the time, brush-bound finishers can still achieve a perfect surface. Necessary to get paint to grip the surface a great alternative to sandpaper that provides that “. 'S not removed from the surface was painted with lead-based paint, how sand... 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In weight, fiberglass, metal and painted surfaces sand finer than # 180 grit that ’ s a of... Restain painted wood: using sandpaper adhere to stain from paint spills excess wiped off cracks with brush. The job done more quickly starting first with this Ranger that I the! Shellac, lacquer and water-based finish, but they still leave cross-grain marks in air! ( paint thinner ) or denatured alcohol to hollowing out the fibers is sand metal and painted.... Situations, however, benefit from a sealer lengths of time 7 issues of woodworking projects and.. Distress painted wood furniture as sunbursts and marquetry the finer you sand, the top chamfered. Guide to help you distress wood with sandpaper abrasive particles and reduce airborne dust, wet the wood necessary fill... Be a bad combination I will recommend sanding before painting exhaust system, such as pine or fir well apply... Vibrator sanders, but it does take some practice grain to avoid using phosphates ( which are in! Cases, as this will press the tack cloth advancing to the directions on sanding painted wood sander when wood... And wrap it around the area where you 'll find it in the text to up! Redistribute the dust up in the wood, prime a second time then sand to a professional-quality....