Simoniz, Turtlewax, these have a fine abrasive and petroleum distillates. Simichrome, Flitz, etc. have no abrasives but use oxalic acid. Never Dull, Red Bear "waddings" use unknown-to-me active ingredients, but I'm sure there is some kind of distillate as well as oxalic acid infused in cotton wool. I like the waddings best, and after I buff up the chrome/nickel/whatever I apply an automotive wax to protect it. I will resort to ULTRA fine steel wool (0000) lubed with oil when the pitting is bad and I don't agree that THAT makes it worse later. Once you get pitting the plating has been partially lost so rust WILL return if you don't protect whatever is left. The aluminum foil trick is a "trick" that deposits a bit of aluminum over the rough rusted spot, when it works and IF it works...I don't play that.