I think see what you mean... So, I would shoot the colors I wanted my flames to be, clear coat, then tape the flames off, scuff, and shoot the black last.
Cool, that helps...
Should I use a black base and a clear with a flattening agent? This would probably create a lot of build and an edge on the flames.? Is there another product similar to JDBB that will work in a single stage type application to try and avoid the edge?