For the most part, powder coating is used for metal objects—appliances, garden tools, engine parts, and so on. But any object that can be given an electrostatic charge is a potential candidate for powder coating. This includes glass, wood, and many kinds of plastic (think of your charged comb). The only problem comes in the curing process—plastic melts at fairly low temperatures, and wood can burn. So special types of resin powder have been created that melt at much lower temperatures; still others can be cured using infrared radiation, with curing times as short as a fraction of a minute.