Join Date: Apr 2013
Location: Peoples Republic of Kalifornia
I'd soak it in a solution of citric acid (only with unplated blocks) or Mayhem's Blitz part 1, which is phosphoric acid + surfactant, etc. If you use the latter, heed Mayhem's warning. Also, if you let it soak too long you'll begin to turn the liquid blue. This is copper acetate and when disposed of, dilute with plenty of water.
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