As far as body painting, you don't need an entire can to do 1 body. In your case, you should be able to put 2-3 coats of orange on with only 1/2 a can. Especially on this small of a body. Then a nice thing to do after it's dry and before removing window masks, is to paint the inside lightly with black. That makes the body look more solid, and makes it look better when looking in the windows. Makes it look less "toylike" when the sun shines thru the body.

Enjoy your Cup Racer. I've almost worn out the first set of stock tires on mine. Only a couple of traction/barrel rolls due to rocks in the road, but a little road rash gives character.

Cheers,

Skottoman