HELP!! skim coating over a painted and papered wall
I am remodeling a bathroom in a 1960's house and the walls are in rough shape. They had been painted several times and then covered in wallpaper. I have managed to remove all of the wallpaper and the glue using hot water and a bit of dif. Some of the layers of paint also came off with the paper in certain spots. Now I am left with the dinged and damaged (but painted) walls underneath. What more do I need to do to the walls before skim coating them. I have read that I need to apply an oilbased sealer, but can I do that over latex paint? What about that GARDZ product by zinsser, will that go over the latex? Can I just skim over the painted serface if I skuff it with sand paper?Also, after I have skim coated with joint compound, what kind of primer and paint do i need to use (latex or oil)? Do I need to used a sealer after skim coating?