paint over wallpaper?
we just moved into a 1910 Greek Revival. We have begun stripping wallpaper from a few rooms and will be painting soon. Questions:
1) the rooms that still have a paper backing on the walls from the old wallpaper, does this need to be removed, or can we paint (prime?) over it? If it needs to be removed, how?
2) the 1980's wallpaper came off like contact paper, but left a yellowed glue on the walls. Same question... can we prime over this or must we remove the (smooth) glue? How?