Coating operations involve hazardous materials and are generally performed in controlled environments. For many military platforms, the coating is a system involving several steps and several chemical treatments. Some parts are dip coated while others are solvent-spray or powder coated. Many coatings require a polymer-cure step and this can be a thermal or bake cure or it could be an ultraviolet light cure. For aluminum substrates, it is important to consider the potential impact of any thermal treatment and therefore work to reduce time and temperature to acceptable levels. Many of the coating processes do rely on hexavalent chromium compounds as corrosion inhibitors. But there are other issues including hazardous solvents and isocyanates used in the production and formulation of paint systems and specialty coatings designed for military application.