Our Metallic Powders can be used with Epoxies, Polyaspartics and Urethane’s.   They should NOT be used with Polyester Gel Coats or Resins where MEKP’s/Catalysts “Organic Peroxides” are being used.  Metallic Powders are oxidizers and could cause a decomposition with the MEKP.      Fiberglass manufacturers should use our Synthetic Colored Powders in their Gel Coats and Resins.