My experience with Rustoleum which I mostly use, is it fades if in the sun, haven't tried waxing it to bring back the shine, yet.
Ed
Makes sense, most single-stage paints I've used fade without maintenance. I'm going to use it on the running boards mostly because it would be easier to touch up as they get scuffed, versus a two-stage with a hard clear coat. Hard to say which would be better.
