steve thanks for opening the subject up a little wider which made me find this info:
• Epoxy - An epoxy powder coating uses epoxy resin as its base. It is suitable for harsh environments but it is not designed for external use. It is preferred for its flexibility, adhesion, and high corrosion resistance.
• Polyester - Polyester powder coatings are known for outstanding tolerance to color change as well as wear and tear. It has excellent color and gloss retention even when exposed to the elements.
• Epoxy-Polyester Hybrid - Made to combine the advantages of epoxy resin and polyester resin, the epoxy-polyester hybrid provides exceptional flow leveling and finish as well as a strong resistance to solvents and other harmful chemicals.
• Polyurethane - A polyurethane powder coating is suitable for use outdoors. It has excellent resistance to corrosion and humidity
I wonder which is used on mag wheels?