my brother has always used harbor freight tumblers and do a perfect job if you want train wheels all polished up n look like brand new when done. he uses different grits sand and the main thing is buy stainless steel sheets about 1/16 or so and use punch out tool to make washers when the washers shear off from the sheet it leaves sharp edges which work perfectly and the edges wear down from tumbling and plate the wheels he takes the wheels off the axles to do this it works perfectly with steel wheels ! you can buy the grit from harbor freight also!
