Sanding can potentially leave a cloudy or scuffed looking surface to your polyurethane finish. Poly is hard to rub out compared to lacquer or shellac, but you can do it to some degree. This does not cost you anything. It is recommended to apply at least 3 coats of polyurethane to your wood projects. Q: What will happen to a wood floor if you do not sand between coats of polyurethane?A: Nothing, provided you apply each coat of finish within a reasonable amount of time. Alternatively, if it doesn’t feel too bad, you … 1-2 coats risks sanding through to the wood, apply 4-5 coats to be safe. Aim for a smooth, uniform finish. Following the buffing methods of using wax and steel wool, I mention below can fix up those final flaws. You can use sandpaper on a sanding block, or you can use synthetic sanding pads. Maybe no sanding can work for you too! Then we buff with an abrasive pad. The idea is to remove dust bumps and create a rough surface a new coat can stick to. Sand the previous coats to make sure there is a perfectly flat and even base for the final coat. You may find brush marks, yet the biggest issue is that of dust. Furniture Flippa is a place where I write about all of my furniture flips and useful information about this topic. Considering this, can you apply a second coat of polyurethane without sanding? Seal your poly projects with at least 3 coats at minimum. Place your workpiece on some plastic sheet if possible (6-mil poly is ideal). Refinishing a piece of furniture comes with many questions that you may have a hard time finding an answer to. Failing to sand between coats of polyurethane does not have a significant impact on the finish. I do not want any gloss, I am looking more into satin finish. This ensures the protectant goes on smoothly and actually provides a finished look. When working on a schedule and time isn’t your best friend you can just leave your final coat of polyurethane without doing any sanding. This will allow the finish to dry faster, so you can sand the surface sooner. No, you don't sand the final coat. What Happens if You Don’t Sand Between Coats of Polyurethane? Also Know, do you sand the final coat of polyurethane? However, the solution is quite simple—rub out the finish with fine sandpaper and synthetic steel wool. And the final layer won’t need any sanding at all (provided that it’s been spread on evenly). If you want a natural wood finish, you can skip the stain. I am staining and finishing oak doors for the first time. Unsanded wood is hard, bumpy, and often unpleasing to the eye. If you need to knock down blobs/ runs/ etc, then start with 120 on the handheld random orbit sander. But you should not sand the final coat of the polyurethane. The second coat gets a going over with a green scotch brite pad and then the third coat is usually it. When the pencil lines disappear, you’re ready to move on to the next grit. Brush on three thin coats with a foam brush. It's possible you are spraying too thick coats. Do You Need To Sand The Final Coat of Polyurethane? You make sure you either spray it, or lay it on nice and even. While they both have uses, you tend to find for the best finish and protection of your wooden surfaces; the oil-based polyurethanes come out on top. This will lightly sand the surface removing dust particles while reducing the cloudy-looking finish. Vacuum and then wipe with a compatible tack cloth to remove dust and residue. Yes, you can lightly sand the final coat of polyurethane with a 600 grit sandpaper, however, sanding is not required. This website hosts personal opinions of information. Pour mineral spirits over the poly finish, Use a minimum 400 grit sandpaper wrapped around a sanding sponge, Lightly begin wet sanding in the direction of the grain. It needs to be free of paint, wax, grease and old finishes. Lightly sand in between poly coats. Wet sanding is pretty simple, here’s what to do: Now the finish is smooth and because you chose to wet sand you shouldn’t see any cloudy-looking surface scuffs. (You can use a natural bristle brush with oil-based poly, but keep an eye out for loose brush hairs.) Buffing to this degree is recommend for busy surfaces that need that durable surface. This is also the time to remove brush marks and blemishes. If you plan to dry sand as a final touch, just do a quick wipe without applying too much pressure. While it sounds counterproductive, the oil ones are easier to apply. Sanding can potentially leave a cloudy or scuffed looking surface to your polyurethane finish. If this is your first time working with Varathane, there may be some uneven spots. Use this to wipe the surfaces you will be finishing. A gloss finish since it is free of flattening compounds is clearer. 6 Do You Sand The Final Coat Of Polyurethane? If you have air bubbles trapped from previous coats you will have to sand back to get them out. You may find it easier to use a sanding block to keep an even pressure. What do you do after you apply the final coat of polyurethane to smooth out the imperfections? Sand lightly with 240-grit sandpaper between coats, then let the last coat dry for at least 24 hours. Even so, I still advise that you sand between the coats when applying polyurethane as this will help increase the adhesion between the layers to give you a more level finish. This means tabletops, end tables, nightstands, and coffee tables. Realistically, dry sanding polyurethane at any grit can potentially leave a scuffed looking cloudy surface. (Read Best Belt Sander). The polyurethane will sand easily, so be careful not to sand through the thin coat and damage the stain or wood underneath. Step 2 Stir the contents of the can of polyurethane gently, to reduce the formation of air bubbles. 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