I'm thinking that my satin paint will probably be good for washing only. I doubt I could use wax or buff it and don't really need to. I would need a good paint for the stripe and would like it to be satin.
You'd probably be fine with satin. Sooner or later you'd get wax on it though, I doubt it would be a problem. I have satin black on the radiator support and I'm pretty sure it could be waxed without issue.