I don't use my roof rack for anything so it was one of the first things I dipped. Here is a bad photo from the view of my cubicle. Yes my parking is intentionally horrible. Don't need people parking next to that sexy beast. Can post better pictures if needed.
I plasti dipped mine black. see if the link works.
https://lh6.googleusercontent.com/-...u9-gItjLFsY/w1073-h805-no/20130806_154002.jpg
I Plasti-dipped my roof rails black and haven't touched them for at least a year since. I use mine all the time in the winter b/c I'm putting 4+ snowboards on top of the car. They look great still.
Check out page 22 of the "share your shots with us" thread, or try this link below,
http://www.mazdas247.com/forum/showthread.php?123812973-CX-5-Photos-Share-your-shots-with-us!/page22
I would definitely do it. It is durable and looks 10x better in my opinion.