As noted a few months back, we found a stash of random brass knickknackery in the stables. With some soap and water I managed to get the muck and bird poop off just about everything, and now it’s stored away until we figure out what to do with it all.
There were a few things we kept for ourselves–some fun egg-like things, a giraffe, a unicorn, a sundial and a small plate. All were pretty trashed with tarnish and corrosion, so I did some research online 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 placed the items in and left them to sit overnight. The results are pretty awesome.