Patina … is a green, blue or brown tarnish that appears on metallic surface, and is produced by oxidation and other chemical processes over time.
Any surface — cement, plastic, glass, plaster, metal, wicker, paper or PVC — can use patina. We've tried and can highly recommend mirror frames, photo frames, birdhouses and planters.
Leslie Gnaegy applies the Patina Green using a spray bottle application.
Leslie applies the Patina Blue using an inexpensive sponge.