I may have made a mistake, delving into the aforementioned room... OMG. DO NOT paint over wallpaper, or you essentially cripple the next homeowner. UGH.
Painting the wallpaper does something to the way the two layers adhere to one another. Essentially, instead of being easy- relatively easy- to peel off the top layer --> IT'S NOT. I am pulling off tiny pieces, sometimes an inch at a time. Neither water or a regular steam cleaner are helping. I am renting a wallpaper steamer on Friday, hoping that it is hotter and more concentrated. Scoring the paper hasn't helped, plus it's over horse hair plaster --> it makes marks in the plaster. Waaaaaaaaaaaah!!