I removed wallpaper in my kitchen. The wallpaper all came down in one piece. The walls appear to be skim coated. The wallpaper glue is flaking off of the walls and also has created a very uneven surface. It seems to me that perhaps the walls were not primed or painted prior to having been wallpapered.
Obviously, I would like the walls, after painting, to be smooth. It looks like I will have to sand the walls very carefully, unless there is a product that will remove old, dry paste. Does anyone have any other options?
If you mean that the wallpaper was hung on unprimed, unpainted drywall, then I would scrape off as much paste as possible using a flexible 4 inch putty knife, prime/seal the walls and then do a couple of skim coats with drywall mud and sand them to make them smooth.
If you mean the wall paper was hung on painted or primed drywall, you can use water and a flexible p. knife to remove most of the paste. You will still have to prime/seal the walls and you will likely still have to do extensive drywall repairs, but hopefully not skim coat.
Unfortunately it is almost always hard to take down wall paper, because almost nobody puts it up correctly.