I have some scuffs on the corners and steps of my white plaster pool from the black robot falling around and maybe some kids toys. They come off pretty easy by hand with a heavy duty scotchbrite pad. Normal brushing does nothing. Am I doing any harm by scrubbing the spots with the pad? Plaster was done last December. I don’t want to do any damage, this is my first pool and have no idea how gentle we need to be.
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