Quoted from Cozmos001:
Point is the sharpie marker worked after one coat. I'd like to see rust come through in 5 years after 3 coats
The ingredients seem to be similar to that of a sand free primer. Its giving me a brushed flat metal finish rather than a shopping cart mirror finish. it makes the entire play field look new!
It won't last very long between the ball wear and the rusting that's already in progress. Only hardened paint will resist wear (as in, a powdercoat), white a sharpie won't do much. Plus, paint/ink generally doesn't stop the further development of rust, and the reaction will continue underneath the surface of the paint, and eventually erupt through the paint. Rust is similar to an infection--if you don't eradicate it, it will keep advancing.