Have you found out a solution yet for your pool walls? I have essentially the same pool and I'm starting to have rust spots as well, not as bad as your photo but I'm trying to prevent that from happening.
Hello, I have an older pool(built in 1963) it's concrete floor, stainless steel walls, and has been painted with epoxy paint. I'm starting to get a couple of rust spots on the Stainless steel panels and on the joints of the panels. I've looked all over the internet trying to find out the best...