I have an early 1900s home with lathe and plaster walls. One of the rooms needs to be repainted, but we've discovered that the walls were covered with some type of paper (but not wallpaper) and then painted. The paper is starting to crack and become crusty along the edges where it meets the wall trim, though nothing very significant.
I peeled back some of the paper to find a rough-textured plaster (almost like a rough concrete)underneath. My question is:
1. Should we leave the paper in place and just paint over it? We could probably apply some caulk along the edges to keep them down.
2. Should we remove the paper and apply some product to smooth the wall's texture prior to painting (and if so, what product would be best)?
I'd like to do this "the right way" and one that does the least damage to the integrity of the house. Any suggestions are appreciated!