Then take a fine sanding sponge and sand it smooth, and get rid of any edges and primer over it or paint it if you already painted. Unless theres an attic full of blown in insulation or vermiculite above this. Unlike 3/8', 1/2' can support itself when hung on a ceiling. You dont necessarily have to remove it, but if you go over the top you should go with 1/2'. Let it dry and do it again if the wall is still porous. Once the paper facing is damaged to that extent the drywall has lost a lot of its structural integrity. ![]() What you are doing is sealing the mud so the water in your latex paint won't be absorbed into the mud, lifting it and ruining all your hard work. If they bother you a lot, do a very light skim coat of drywall mud over them, push the drywall mud in the holes then wipe it all off. Once you are happy with the final finish, be sure to prime using a PVA primer or other primer specificaly described to be used on new drywall. This will remove all the dust that will cause the skim mud to curl off the wall during application. You might have some success with painting over those areas with something like Kilz, but even then, you might get bubbling. ![]() clean the entire surface with a damn sponge, rinsing the sponge often. Be careful with any areas where the wallpaper pulled up the outer layer of drywall and exposed the brown paper - those will tend to bubble up when you skim over them. ![]() If you do need to put on a second coat, which is almost always the case, be sure to knock down any trails or ridges with a drywall knife and lightly sand the surface to remove boogers and loose dried mud. I prefer a good 12 inch knife to a trowel, and dipping it in water before final pass helps make a smoother surface. It will really make the mud glide on smoothly with fewer tiny pock holes. You can also add a few ounces of Ivory dish soap to the mix. Be sure to read the label as some manufacturers specificaly state "Not for Skim Applications".Īs said by the others, thin with water and mix well with a large drill and paddle to remove as many air bubbles as possible before attempting to apply.
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