At AEON, we recommend opting for a PVD finish where these are available. PVD, which stands for Physical Vapor Deposition, and is also known as thin-film coating, is a specialist manufacturing technique where the coating is vaporised and deposited atom by atom onto the steel surface, forming a bonded, metal or metal-ceramic surface layer. The end result is a highly durable, beautifully even finish that functions as part of the radiator itself; it will not tarnish, chip or corrode, just as the original stainless steel would endure.