Hi, I hope someone can help me. Over the weekend we removed some wallpaper from a internal wall in the living room. Across the middle of the wall, we noticed a few bumps and curves sticking out from underneath the wallpaper. On removing the wallpaper, the areas which had the curves and bumps the plaster crumbled away, leaving holes in the wall (there is grey concrete type stuff behind the more recent skim coat :-( The wall was painted before the wallpaper was put up, but this is easily peeled off also, so you can see the plaster underneath, in some areas it looks ok and in some areas, the plaster looks damp ect, mainly across the middle. The wall looks a complete eye sore now, and I don't know what to do for the best. We are putting our house up for sale soon, so want it sorting, but worried its going to become an expensive job. Any advice would be appreciated 
