Have them in a garage sale stainless colander sitting in a 5 gal bucket filled with laundry soap and water. After a day soaking and stirring , a good rinse with car wash pressure washer. Then to coin star after they dry spread out on old carpet. Pics later
one could borrow or buy a cement mixer and clean them all at once...add 2/3 volume of water and half bottle vinegar and let run for all day.We did almost $300.00 worth and they came out pretty good,totally useable
I dip my my clad in CLR rinse and dry, then feed them to my banks coin machine, only had 50 cents rejected which I passed off in change to stores, who return it to the mint.
Any coin you find should be looked at with a 10X magnifier! Even CT's (clad tokens they call coins these days). Want to drop a repunched mint mark or a double die in a coin counter? Even the 1995 penny sported at least 2 double dies! A 1955 double die would buy you a new sportscar! Are you a treasure hunter or a "tot lot lizard"? What about that crunched up, broken and torn piece of metal you found? Is it leave-it-rite (leave it right where you found it) or is it a silver ring the groundskeeper hit with the mower?