As noted a few months back we found a stash of random brass knick-knackery in the stables. With some soap and water I managed to get the muck and bird poop off just about everything and it’s now stored away until we figure out what to do with it all.
There were a few things we kept for ourselves. Such as some fun egg-like things as well as a giraffe, unicorn, sun dial and a small plate. All were pretty trashed with tarnish and corrosion so I did some online research and decided instead of using brass cleaner and brute force I would make up a bath for the items–a bath of ketchup.
I picked up a plastic container and a couple of super-size bottles of ketchup and filled one with the other. Then I placed items in and left them to sit over night.