Renting, so we will not spend ALL our money, however we are fixing the bathroom and have started peeling the latex paint off the enamel undercoat. Moisture is a problem as there is no fan and a very small window. We have areas of two paint layers, others of drywall (some wet) and some of one paint layer. Mushrooms growing where the front of the tub meets the wall is a big concern. Any ideas would be appreciated. Many Thanks.