Tub and tile surround ripped out today. The water damage wasn’t as bad as I’d feared, even though it looks like some previous owner had indeed tiled directly on top of the plaster and paint - no water proof backing board. Looking closely at the layers of paint it seems the bathroom has not only been white and Pepto-Bismol pink, but also lime green and two or three distinct shades of yellow. Seventy-five year old homes are something else.