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Best cleaning method for old lock .

T

TTinCa

Tenderfoot
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Found this at low tide in brackish water near San Francisco Bay . It has a thick encrustation on it . Does the green color signify anything ?
How would you guys go about cleaning this ?
Thanks TT
 

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The green stuff is verdigris and means the metal has copper content. You can remove it with a dremel
tool with a brush attachment but it looks good as it is. Not valuable in either condition.
 
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