I don't know specifically, but if you have trouble getting answers here,
try organizations of coin collectors.  I have learned all sorts of things
about preserving coins that way (though unfortunately not how to remove
hardened adhesives).

At 03:26 PM 2/13/2001 -0500, you wrote:
>Hello Museum-L
>
>   I work for the Philadelphia Archdiocesan Historical Research Center, and
>one of my co-workers has run into a problem that I am hoping some of you can
>help us solve.
>
>   While taking apart aome broken shadowboxes, we ran into some papal coins
>that were mounted on wooden pegs with what looks like rubber cement.  We
>have managed to get the pegs off f the shadowboxes, but we can't get them
>off of the coins.  We thought about just trying to pry the coins free, but
>many of them have engraving under the glue, and we don't want to destroy
>that.  We also don't want to scratch the surface of the coins.  If anyone
>has any suggestions on how to remove the glue and the wooden pegs without
>damaging the coins it will be greatly appreciated.  Thank You.
>
>Brent Stauffer
>Archives Technician
>
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Vincent T. Lyon
Robert Crown Law Library
Stanford University
650-725-0810
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