Don't blame you. People swear by the por-15. I've had pretty good luck stripping all the rust off with a wire brush attachment in a drill. Then using Rustoleum Rust Restorer. Once dry, I would then plasti-dip. You will probably have to do each side of the hinge separately else they will stick together and twist the plasti-dip on the first use. Or you could try cutting the seems afterward. I would do them separately myself.