Tried that on an old bronze door knocker last year. Mixed white vinegar with a little salt and left it for about twenty minutes. It took the green gunk right off, but you gotta rinse it super well and dry it completely.

Wait, you fought the wrong account for half a year?

Yeah, it's nuts. I once followed a rumor about a local store closing back to one angry Yelp review. The whole town was talking about it for weeks.