Need some cheap polishing media for your vibe tumbler?

Go to your local pet store and get a bag of crushed walnut shells (used
to line bird cages), about $3. Squirt in some liquid metal polish (
it may clump at first, but will soak in). Don't add water. Set it &
forget it. Check every 30 minutes.

If you need to debur edges you'll need something more aggrerssive like
ceramic media with water.

Ed