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Re: [Orchid] Removing rust from an old silver coin  
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From: Gary Bourbonais
Date: Mon Dec 05 06:41:40 2005
 
     
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>     A friend of mine recently found an old silver coin (1697) with a
>     lump of what looks to be rust embedded on the face of the coin.
>     He's tried all sorts of things to get the lump off, but with no
>     success. Anyone have suggestions? 

    Now bear in mind, one might not like what you find underneath once
    the corrosion is removed....may have a patch of pitting underneath... 

    Might try soaking it in household ammonia.....I recently cleaned up
    a silver jital that way..... Time is anywhere from a few hours to a
    week, depending.... The solution might turn blue....so use a tongs or
    something to take the coin in and out....Used a small glass bowl for
    this... 

    If that doesn't do it, you can try alternating with the ammonia and
    vinegar or lemon juice....cleaning with soapy water between baths... 

    Good luck to your friend....cleaning patches like that sometimes is
    like a crap shoot... 

Gary W. Bourbonais
A.J.P. (GIA)

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