You should only use airbrush colors in your airbrush. Gel food color has fibers in it that will not only clog your brush, but cause speckling. I use Amerimist by Americolor. You can use pearl dusts, petal dusts, luster dust (no hologram or pixie dusts) diluted with vodka. But gel colors are a no-no.
10/8/12 at 8:23pm