How does powder coating work, and how is it better than spray and liquid painting? For starters, there's something involved called the principle of electrostatics (the force on a charged point exerted by a second charge is proportional to the product of charges, and inversely proportional to the square of the distance between the charges...blah blah blah). Its clean, its dry, and most of all, you get a tougher surface finish. Anyway, watch this video - courtesy of Eastwood Co.
Brooker Enterprises specializes in Powder Coating. In this video, they show you how they powder coat a customer's frame to her color of choice. Video courtesy of crankmychain.