AGiving this a bump just incase anybody who wasn't awake last night hasn't seen it and has some tips....
I've never airbrushed things I have done with an impression mat. Even with a sheen, the texture still won't pop because it is too even of a spray.
I would definitely use luster dust - maybe just a super pearl to highlight the embossed pattern. Those pump brushes work great for this.
ARight....I have one of those brushes. I think I'll try that next time. I suspected the airbrush made it look flat. Thank!!!