Airbrush artists?

I'm interested in getting a motorcycle helmet custom painted, and it's a serious dork design. Right now I'm shopping around for a place to cut a reflective white decal in the design of the Shadow of the Colossus weak spot pattern (dis one).

Now here's where the airbrush comes in. I want the rest of the helmet painted with a grass/moss/stone texture, even slightly covering/overlapping the reflective weak spot. The more digital the look the better.

Anyone on TNL capable of this?