cleaning coins

Do you use a tumbler to clean your coins? If so, do you add grit to the mix, and if so, what grade? It seems most folks use vinegar or lemon juice and small gravel stones. Any other advice?

Hey guys, so recently I dug up what I thought was going to be a really decent silver Washington quarter. but I could not see the year. I broke all the rules and cleaned it myself first I put it in hot water with a mixture of dial antibacterial foaming hand soap and dish washer rinse aid. I kept...

How well did this biker ring clean up? I cleaned the Biker ring I dug up Sunday at my Dad's place. I left the patina on the bronze Indian face. The bronze head is mounted on a brass disk. The band is Alpaca silver. The band has got some pits, especially below the cartouche that you can see in...