covering those parts with tape..then spray those at last ... or cover the whole body and leaving that part out, spray it with black first, then other colours.
alangor: if u want to make the line for the door or bonnet and so on.....maybe u can use the oil based marker......may find it in the stationary store.....
Bloodyhell : sorry that u maybe misunderstood (I GUESS!!!)what he said...
your method may be helped to make the window frame.....but i think it's bit difficult to make the line for the door or bonnet.......hehe!!!!hope u dun mind la!!!!