Paint colour for backing plates ?

Well I guess I'm pretty much right where you're at, it just rains where I live and just kind of Summer Cruiser type thing also. I just don't know how long any good paint or cleanliness will really last in that area? I really did a fine job of cleaning all my suspension parts and painting the A-Arms and stuff like that but there's just one or two areas that I feel unless it's going to go across Barrett-Jackson mirrors is kind of not necessary to do more than just a good cleaning. Again just my two cents for me.
Well I hate oxidation so everything gets a splash of something. I'm in it for the long haul. I hate rust! I have 2 sets of backing plates, both painted so I am hoping not to have to buy more. Cheers!