I have no objection at all especially as I got the idea for Drag Strip from this site:
http://guysipainted.blogspot.com/
I used a flat white and Citadel blood red for Ratchet. I sprayed him white first because Ironhide's red is a b*tch to paint over with white.
For Drag Strip I used a Humbrol matt yellow, but any matt yellow should do. Or gloss, depending which you prefer. Blood red for his feet and eyes and purple for the helmet.