We only use the highest grade of UV powder coat to ensure longevity of the finish. Powder coating typically last 6x's longer than paint and has high resistance to scratching, chipping and marking. Powder coating is used on outdoor furniture, automobile parts, tire rims, bicycles and appliances to name a few. IMPORTANT FOR RAW METAL SIGNS::: Signs can also be purchased in Raw Metal with a Powder Coated Clear Finish that will provide protection from Rusting or in Raw Metal Only. Raw Metal Only signs WILL weather and rust naturally to provide a unique finish. Please note Raw Metal signs will show imperfections from the mill, marks from the cutting process, and each sign will have a different colored finish depending on the Mill Lot. Colors can range from black to silver, depending on the lot and batch of metal.