Vinegar is an acid too. Copper is the only acid-resisting component from this alloy.
Administrateur du catalogue, référent de nombreuses nations antiques et de la Lorraine.
Catalogue administrator, numerous Antique nations and Lorraine referee.
My grandfather died recently and my father brought me home some old pennies and halfpennies that used to belong to him. He said "they were a bit dirty, so I cleaned them up with some vinegar" and he handed me some pink monstrosities like the picture above. I put on a brave face and thanked him kindly, but I was dying inside.
