I have removed VERY stubborn wallpaper from drywall. It is in a hallway, stairway and foyer. Nearly all of the walls now have a very uneven finish, where the wallpaper paste has not come off and is in clumps. In some areas, I have rubbed too hard, and have removed the top layer of drywall. There is a LOT of wall space that is uneven. Should I continue to work the paste off, or start the job of applying compound to nearly all the wall space? Soaking the walls seems to be working against me at this point. What should I use to remove the paste? Help! Getting very frustrated.