Originally Posted by squarehead

Or you could pull off my trick for spoilers and wings...

Lightly cut the paint overspray film after the whole body is painted, remove the spoiler/wing areas, and shoot it from the outside with black or silver. It will go on matte, and you can finish detail with silver or black Sharpie markers to make "rivets."

It's easy, simple and very effective in detailing spoilers, scoops, wings and other details that aren't part of the paint job.