I want to prepare a ceiling for decoration with emulsion paint.
The ceiling is skimmed plasterboard. It has previously been painted with
emulsion paint. Then it has had wallpaper pasted over it. Then it has had
the wallpaper taken off, using a steam wallpaper stripper.
At present, the ceiling in general has over its surface a variable, thin
film of wallpaper paste. Is it essential to remove by washing all the
wallpaper paste before applying fresh emulsion paint, or will a slight film
of wallpaper paste cause no problems for the emulsion paint?
Also, the steam wallpaper stripper has also removed irregular strips of the
original emulsion paint, thus leaving very shallow depressions in the
ceiling surface. The largest strip is around one metre long by five
centimetres wide. What are good ways of dealing with this problem?