SplitS sure nuff understands the logistics of stocking 3, 4 or more systems....mucho investmento.

Another approach that works about as well as other systems...but is about as inexpensive as paint can be, is to shoot lacquer primer/filler over glass....base pigment of white (ie) Rustoleum flat, rattle can color trim then automotive clear coat of your choice to top things off. The color coats need'nt be fuel proof as the clear will seal things up. That means the only expensive material you have to have is the clear, hardener and some cheapo wah lacquer for cleanup.

Probably the most universal colors: Red, white and blue (MonoKote) can be very closely matched with Krylon.