I painted my bathroom several years ago (actually my wife did the work) and pretty quickly the paint started to peel. I think we used gloss or semi-gloss paint for the bathroom but I don't know for sure. I have 2 questions on this I guess the surface being I imagine plasterwhat is the best way to strip the old paint off and start again. Also what is the best way to prevent this from happening again. I need to clear one thing up though this is the upper part of my shower and tub surround above the tile line.