Since first reading about using 'rock tumblers' and 'vibration parts polishers' to polish old pinball parts (see here), I've been keeping my eye on eBay in hope that a cheap rock tumbler might turn up. Then I realized that if I want a good tumbler there's really no way of getting one on the cheap, so I had a look into the vibration parts polishers. These are much more affordable, and probably better suited to pinball parts anyway since you can fit larger parts into them.

The vibration polisher of choice seems to be the 400 Tumbler by Berry's Manufacturing. You can buy this directly from Berry's for $60 +shipping, but in my infinite cheapness I decided to have a look around for a better deal. I ended up finding the exact same model, rebranded and sold by Cabela's for $45. They also sell the 'Cabela's Case Tumbler' as part of a kit with a sifter, corn cob media and brass polish for $56. I'm not sure if I'll use the corn cob media or brass polish, but figured what the hey and ordered the kit.

Now to find a local pet store that sells crushed walnut shells (used to line lizard and bird cages). If I can't find anywhere I might just go ahead and use the corn cob media. What's the worst that could happen?

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