Rust Stains from your tie wire or rebar inside the pool shell will only get larger sized over time. Resurfacing your complete pool is the one way to get a steady, stain-free look for the pool surface. To seek out the amount plaster is needed for resurfacing, evaluate both sides https://www.google.com/maps/place/Griffin+Dynasty+Pools+%26+Pavers/@27.9944826,-82.4542804,11z/data=!4m6!3m5!1s0x4cc1d94a9a209c39:0xa3a811aca4d85bfb!8m2!3d27.9944826!4d-82.4542804!16s%2Fg%2F11ldxknjdm?hl=en&entry=ttu