Cleaning sand off a copper bowl?

It's A Trap!

Senior Member
Joined
Apr 25, 2012
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331
Location
Western Pennsylvania, Gibsonia
I found this along a creek, six inches down and next to what was a trolley line. The bowl was upside down when I found it so none of the inside has sand in it. Is there any way to remove the sand and keep the copper green?

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soaking in distilled water changing water every few days, could take weeks but is safest way.
 
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