You can call David Quan the guy behind many of the large-scale murals on the sides of buildings along Grand Avenue — but he prefers to stick to the moniker Luster Kaboom. The local artist and comic started his Grand Ave. mural habit on The Trunk Space with the huge green face of a slobbering monster (sporting very sophisticated glasses). Since then, he's painted the insides of the avenue's galleries and on the front of Citywide studios. Our favorite so far (along with the one he painted on our own building, in honor of Best of Phoenix) is his blue "goo-scape" on the side of the Chocolate Factory. Quan jokes that the bright aquamarine was the cheapest color for his airbrush machine. If that's true, thank the hardware store, because the dripping, oozing, mural that wraps around the building just gave us yet another reason to park the car along the avenue for a closer look.