Texasfire ---------------
I think, Airbrush is a good option too !
For signwork I used to do what David L suggests in using an illuminating color for an undercoat.
such as tan, silver, white, or even yelow.
And if you did this using airbrush, because it not only uses less paint ,
dryes faster, and takes less time, And hopfully aid in solving your problem ? -------- Wild Bill46