Rust on metal pool walls

nickprette

Well-known member
Sep 2, 2016
49
Lomnbard,IL
Very old pool I guess they made them like this at one point. See zoomed out photo if your confused on what I mean See second photo for a clean part of the wall then see third photo of it getting rusty. I’ve had the pool for 4 years never see it get that bad looking. Really wanted to try CLR and some sand paper but obviously worried about chemistry. Any thoughts? Comes off with a really hard thumb rub lol and water
 

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