We are attempting to remove the wallpaper in our family room. It went up circa 1978 by the original owners of the house. We are scoring and using a steamer and the top layer comes off well. A bottom layer comes off in patches and is difficult to fully remove. That bottom coat is almost rubbery (latex paint??) and below that is bare drywall. There are some areas that it is impossible to remove that bottom layer, other areas where it peels off in rubbery hunks.
What do we need to remove? And what preparation do we need to do to get these walls ready for a top coat of paint?
Thanks in advance,