so, you got yourself a chrome mopar, right?If it don't go-chrome it. Sorry- wrong hobby!
Someone actually did that with Monokote for his RC airplanes and found red was the lightest. So, all his planes were covered in all red. They looked like ass.[total_BS]Depends on what effect you want. Red goes faster, Blue goes higher, but it's harder to see. [/total_BS]
Real talk: what the others said. Try and get as smooth a finish as you can, without adding 10 layers of paint (and the associated extra mass). If you Reeeealy wanted to try something, you could.......I don't know, weigh two different colors and see if the pigment of one is lighter? That's kind of a long shot.
You wanna' go faster? Cut weight, but not so much the wheels come off.I should write an article on optimal mass; it's counter-intuitive. Maybe there's a way to come at it that doesn't require understanding the underlying forces. The "throw a feather" analogy might be a fruitful path to follow...