Modern Masters Metal Effects Oxidizing Copper Paint is a water-base, modified acrylic paint with a high concentration of real copper particles. It will tarnish naturally over time, if exposed to the proper elements, but Metal Effects Green Patina Aging Solution will speed up the oxidation process to create a beautiful authentic green patina finish in minutes. Popular applications range from full interior and exterior walls, moldings, trim, columns, doors, railings, to lamps, vases, and planters.