cr0sh:
Never looked at powder coat - is it a plastic (in particular - a thermoset plastic)? For some reason I had it in my mind that it was metal of some sort...If so - that would pretty nice, especially if it is a fine powder (toner is a very fine powder - and not something you want to inhale); the powder would have to be of a particular granularity to avoid scattering the light too much.
Yeah it's a plastic, and extremely fine -- normally you'd use an electrostatic charge on the object you're coating if that gives you any indication. In a DIY fashion you can bake it on in an oven or even use halogen lamps. www.caswellplating.com is a good place to check out if you want to see what's available.