I just did mine blue and red with metallic blue and metallic red of some sort. I laid down the red (3 coats), sprayed the white backer for floureceant paint (that's what the can said), let it dry for a while with a heater fan, peeled off my masking then sprayed 3 coats of blue, then another couple of coats of white. I used the full can of white backer.
It was my second and I forgot to press the edge of the tape down... You can see where it bled under the tape by the bottom right of the windshield.
I wish I knew how to paint better... but then again, I would spend more time on it and it would get trashed anyway, so who cares?
I also painted my rims with what little black I had left. They look pretty cool, but you can't hardly tell in pics.