adam - just to clarify your question to me: no, keeping it in the dark for 6 months won't do a thing. once the sunlight hits it (and i assure you it will, unless you want a permanent garage ornament), the resin used on the CF WILL discolor and cloud, no matter what. so you'd be paying baller money to get a full CF car...that will eventually turn out...well, you get the picture
while it's never going to have the WOW factor of a full CF car (which i never quite understood anyway, i think it's nasty looking to have a full CF car honestly), black with CF accents will look very, VERY good. if you were able to set aside that much cash for a full CF project, though, i might suggest getting the car painted to a dark gunmetal gray or something, so the CF accents have something to contrast against.