Copper occurred in several trades, pot making, boat making, saddle making. The copper rivet was used as a fastener in all of these trades. The washer for the rivet was called a "rove" in boat making and a "burr" in leatherwork. Copper was also used for the penny and half-penny coins. Silversmiths trained their apprentices on copper sheets (plate). It was a useful material for repairs and copper wire is seen in period repairs on tool handles. Iron rivets work best when the rivet is hot. Iron rivets were preferred by blacksmiths, although they used copper, as well as brass, for brazing. Copper rivets work fine when worked cold. I have seen them in tinker's repairs on period pots and kettles. Paul Revere is said to have set up a copper rolling mill. I would not be shy about using it on any homespun accoutrement.