Are there different powders for interior and exterior?
Interior coatings if they are for the home or office are generally very simple. Some wear and tear issues and possibly UV from a window make effect the powder choice. Generally low film 2-3 mils hybrids, polyesters or polyurethane’s are used Exterior is for more critical. Corrosion and weather ability are important considerations. The location of parts close to roads & freeways, chemical plants, coastal regions or other corrosive environments are critical defying the end use performance. Pretreatment on steel, If the substrate is heavy enough to handle it, grit blasting to sp10, 2 to 4 mil profile is always recommended. A corrosion resistant Base coat and UV resistant top coat are recommended and can greatly very based on the corrosive exposure. For typical steel lawn and garden products a five stage iron phosphate pretreatment and a good quality polyester is generally satisfactory. For typical aluminum extrusion window, lawn and garden products a five stage aluminum conversion pretrea
