Powder coating is important because once the powder coating cures, it creates a durable finish that causes the marine-grade aluminum to last for years. In short, this is because when the powder coat is heated, it creates cross-links, melts, and then forms a sheath of protective coating on the aluminum.The Application Process:A prepaint coating is applied to the metal.The planters are heated to ensure the prepaint coating dries evenly and thoroughly.The metal planter is electrically charged. This is done because the powder-coating adheres to static electricity. The powder is sprayed on the metal.Once the planter has been powder-coated, we heat it to cure the powder-coat.Powder-coating heavy gauge 5052 marine-grade aluminum alloy, creates a superior product suitable for all interior or exterior commercial applications.