Can I paint modeling chocolate with luster dust/vodka mix? I'm worried it will just bead up. Anyone done it? Thanks!

Absolutely! It works great. I did a birdcage cake and brushed the gold luster dust thinned with lemon extract over chocolate modeling chocolate to get an antique effect. Vodka works too. It does not bead up. Quite the contrary. http://cakecentral.com/gallery/2259339/2259344/birthday-cake-photos

Awesome, thanks so much. P.s. your cake is beautiful!