Acetone is one product that can help with that. Once the lacquer is removed, reapply a new copper-specific lacquer after cleaning, or don’t, if a natural finish is preferred. If an unlacquered ...

A copper penny is heated and suspended above the surface of acetone in a beaker. The copper demonstrates heterogenous catalysis in the combustion of acetone to carbon dioxide and water. This exotherm ...

[Robert’s] first attempt didn´t work well as the copper didn’t stick well. He solved that by dipping the part in acetone ... We suspect it served to clean the part, an essential step in ...