A pool finish can look “ruined” overnight, yet the real cause might be completely normal plaster behavior. I walk through the plaster problems that trigger the loudest complaints, the ones that quietly build over months, and the ones that only show up years later, right when the pool service pro is the easiest target. If you’ve ever inherited a pool with weird discoloration, streaks, or blotchy shading and felt your stomach drop, this conversation is for you. We talk about plaster modeling a...