I bought this, on the recommendation of a vendor, to maintain some brass archery equipment. I have used it on brass releases (hand held triggers that release the bowstring) as well as a silver pen and some brass drawer knobs. It is easy to use. It removed the tarnish with only a minimum of elbow grease and left everything gleaming. Since it leaves a coat of wax behind, it also protects from future tarnishing. It does have a bit of a chemical smell, but it isn’t overpowering. Just follow the directions and you should get great results.