Our Bestway 24x52 round ABG pool rusted out in less than a year and we do not use saltwater and we are not near saltwater. The inside of the poles and cross pieces are not treated and are extremely thin. This is what we used to try and stop the rust once the poles, cross members, and corners were replaced. BOESHIELD T-9 Rust & Corrosion Protection/Inhibitor and Waterproof Lubrication, 12 oz.
I am also attaching a couple of pics of the rusted pieces.
I am also attaching a couple of pics of the rusted pieces.