Powder coating starts with pretreatment, usually some type of abrasive blasting such as sand or bead blasting. This process removes rust, oils, and any other materials that would prevent the powder from sticking to the product. If the product is being recycled, the blasting process can remove old coatings from the metal.
Once the surface is treated, the finish is applied. The powder is shot through an electrostatic gun, giving it an electric charge. The charge assists in a consistent, perfectly thick coating.
The product will then be moved to an oven where the powder gels, flows, and cures to create an even finish. Before the powder is cured, the piece should be handled with care - since it's only adhering through static, jostling or rubbing the surface can remove the powder.