Originally Posted by Cpig

Little late here but if you haven't shot the paint yet... I think free-handing it is the best way to go. I lightly outline the pattern based off of historical photos in pencil then airbrush the lighter color first along the pencil lines followed by the darker color. It's really not that hard to do, you can overshoot as much as you want with the lighter color then nail it down accurately with the darker color. I also pre-shade the panel lines in black before my main/ base colors. This gives a more scale effect, just do multiple light coats around the pre-shading until the shading is coming through to your liking.