I read your post and thought you should know about a very high probability that their could be a lead hazard with you bathroom paint. Their are materials available to make such paint removal safer for the do it you selfer. I figure your in an older home "plaster", "peeling" paint. but if you house was built later then the 1970s, I wouldn't worry too much. If it is built in or before the early 70's I would recommend using a lead test kit (can be purchased at most hardware stores) on the paint so you can be aware of the possible danger before getting to far into it.
Link to New York Sates Q & A Page