This water base acidic solution is applied over the Reactive Metallic Paints. It reacts with the real metal particles in the paints, thus speeding up the oxidation process. The Blue to Copper or Bronze Metallic Paints. These paint and aging solution combinations will create a beautiful, authentic Blue Patina. Can be applied with brush, sponge, spray bottle, or plastic pump sprayer. The entire system can be applied to any properly prepared surface, including metal, wood, drywall, plaster, paintable wall coverings, canvas or muslin, and plastic surfaces. Can be used on interior or exterior walls, moldings, trim, columns, doors, railings, lamps, vases and planters.