I have a couple spots where there are some scars on the plaster of my pool, from a time when I allowed a painter to place a claw-footed ladder at the bottom. The bottom of the scars are plaster colored, not Gunite colored, but the texture is a bit different from the unscarred areas. I think this is just a cosmetic issue and unlikely to compromise the water tightness of the pool. Am I clearly and obviously wrong about that?