I have just removed wallpaper from a gyprock wall using a steamer. Along the way some of the gyprock surface has torn off. Is there any particular filler that members recommend. For small jobs in the past I have used a tube of Polyfiller Skim Coat. This job has some large patches that would involve many tubes (this is a hallway). I suspect that I may not have done all the damage myself, and that it was done before this wallpaper went up. Hope someone can help.