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<p>[QUOTE=&quot;Just Carl, post: 165583, member: 4552&quot;]Just many, many years of experimentation on many things. I was a chem major, taught chem for a while and just love to experiment. Coins all have a consistant metalurgical property so trying different experiments with coins you always know that any differences in reactions are due to the other substance you put into contact with the coin. As to boiling a coin, that only seams logical for cleaning so to add different substances while doing it is purely experimental. For removal of just plain dirt, it works well if the water is distilled and the coin is then blown dry with a hair dryer.[/QUOTE]</p><p><br /></p>

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