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What's the best way to get the olive oil off after a nice soak
Stork
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for a bronze medal for example... Is there a difference for copper? Thanks 
Cathy
Cathy

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Tom, formerly in Albuquerque, NM.
<< <i>Soap and water
<< <i>Acetone dip, second acetone dip (in fresh acetone), and two dips and a rinse in distilled water should do it. :
Copper is definately a challenge, but the soap and water treatment can pull some things that acetone may not and vice versa. 70% rubbing alcohol is yet a different solvent. I have also experimented with the Blue Ribbon and MS70 with varied results and would hold off the latter two until you try it on some other bits not of value.
If these things don't work you might consider the NCS service - I have an EF 1844 farthing that has some crud that may ultrasound off but will send to them.
Well, just Love coins, period.