Yeah it's not like a car at all. My old downhill bike was black, and it was always dirty, but you couldn't hardly tell. It seems bikes mostly pick up black crap, grease, and what not. A car's body is totally different, because it has large flat panels, and bikes don't. Raw carbon would probably be the best color in my opinion, the weave would hid dirt well. It does on the raw carbon parts of my red bike.