I just purchased a home built in 1925, the entire house is wallpaper floor to ceiling over plaster. I want to paint all walls. I have started removing some paper in the dining room and it looks like I have 3 layers of decor paper w/ liner paper in between (total of 6). The house has never had A/C so very little climate control...I am not having any problems removing the majority of the paper as it is crumbling below the top layer. My questions are: How do I remove the drywall mud that was used to patch cracks in the wallpaper(not the plaster, cracks in the wallpaper) this is in between layers of wallpaper. And how do I patch the holes in the plaster? Previous patches were made w/ a primed artist canvas looking material,or cotton sheeting, mud was smoothed on edges to get it looking smooth? I found an old lightswitch hole and access to the steam heat pipes done this way. Below the chair rail I have the canvas stuff painted several times...I don't think I will need to remove it. Maybe glue down some edges. And last question (for now), I'm seeing different opinions on this one...do I use water to remove the last tissue paper thin layer on the plaster or wallpaper remover or steam. Thanks for the help!