Polishes Brass, Chrome, Gold, Silver, Aluminum, Glass And Plastic Not only for cleaning up brass but is the most fantastic stuff you have ever seen on chrome, gold, silver, aluminum, glass and plastic. The people who import it from Germany put it this way: "Absolutely guaranteed to be the best polish in the world or your money back"!! One of the big problems in the gun shop is polishing Plexiglas, and other plastic spacers and inserts. Simichrome will do it "Quick as a Wink".