I live in an old farm style house. A few rooms have sheet rock and has been painted over the years. I painted some rooms and it looks great. A bedroom had paneling up. It was the press-board type that has warped over time and I wanted a change. I took it off(huge mess). Underneath was sheet rock with paper. The paper came off easily. Under that was something that looked like paper, but it seemed stuck tight to the sheet rock. It almost looked like it was part of the sheet rock. I start to paint, and it bubbles in places and doesn't look so good. I am so sick of this project, I'm painting and it will just look like it looks. Is there anything I could have done here? Anything easy that I overlooked?