RAL color sand texture polyester powder coating for stainless steel paint spray — a durable, eco-friendly finishing solution engineered for high-performance metal surfaces. About Dry Powder Coating Dry powder coating is an advanced surface finishing process in which a free-flowing, 100% solid powder is applied electrostatically to a substrate (typically metal) and then cured under heat to form a durable, protective layer. Unlike liquid paints, it contains no solvents, VOCs,