The metalics don\'t work in a detail gun due to the size of the little metal particles. I\'ve shot some wierd stuff through my guns - auto ureathanes, cake coloring, airbrush makeup, latex, enamel - you name it, I\'ve probably put it through there.
The key is to thin, then thin a bit more.
Run it through a piece of old panty hose to screen any solids out.