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Old January 24, 2013, 01:28 PM   #15
serf 'rett
Senior Member
Join Date: June 25, 2009
Location: Stuttgart, AR
Posts: 1,568
Even the small Thumler barrels have flats inside their barrels. The flats offer some "grip" which reduces the amount the materials slide on the sides of the barrel; however, the important tumbling parameters are speed of rotation and the proper water/pin/brass mix.

If the speed and mix are right, you could tumble in steel paint cans in a home grown rig. A little bit of education in rock tumbling gave me a better understanding of the tumbling process.
A lack of planning on your part does not necessarily constitute an emergency on my part.
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