Instruct: Classify a review as either positive or negative.
Query: Easiest polish to use...ever!

This was recommended to me from several friends of mine and, I have to say, all their raves about it were right on the money. This stuff is fantastic! Lightly rub it into the metal and tarnish and discoloration are gone. For really oxidized brass and aluminum, it will take several attempts but it will take care of it faster than anything else I've ever tried. Plus, a very small amount goes a long way. Only one caveat: this is not for use on chrome.