This is the master bath upstairs in my house. I have tried everything( I think) I have put in a larger exhuast fan venting outside. I have used Marine paint ( suggested by painters in area). In preperation I have sanded, spackled. THen used a primary and then painted. Still peeled. Last effort sanded, rather then a primer I used a Kilnz ( kill satin) and then tried same ritual. LAsted 2 months and problem again. It is a stand up shower with glass enclosure. Please help. I am ready to lose it