Profile: Southwest Metal Finishing, L L C specializes in sulfuric anodize, hard anodize and chem film conversions. Our metal finishing service includes hard anodizing, sulfuric anodizing, chemical film coating, masking, bright dipping and color anodizing. Our hard anodizing is used for electrical insulation coating. Our sulfuric anodic coatings are intended to improve surface corrosion protection under severe conditions or as a base for paint systems.