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When you do an electrolysis, you put the + or the - at the coin you want to clean ?
Thinks
Put the negative terminal on the item you wish to clean.
12 volt 2 amp or actually even smaller amp works best. Check it periodically, and let it go very slowly--the slower the better.

-
2332
-
1432
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1351
-
1329
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1114
-
979
-
854
-
844
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698
-
604
-
570
-
568
-
506
-
466
-
461