How do you keep the plastic trim looking new?

[Ma\'Deuce]

The plastic exterior trim parts remind me of the plastic that fades in the UV and turns a powdery grey. Anyone doing anything to keep it looking good? I really hope i don't have to do anything, but i don't like that nastalgic "cheap plastic" look after a year in the sun. then again, living in Mi., you only see the sun a handful of times a year anyway .