A few helpful websites

[FingerGrime]

http://www.njminerals.org/metaldetecting4.html
http://metaldetectingworld.com/cleaning_coin_p6_mechanical.shtml

btw Do you guys think that rubbing alcohol should work well as a degreaser for olive oil?

 

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[Skywola]

If I had my guess, I'd say yes, but never have tried that . . .