Doesn't mean it is a bad idea...just use a different shiny wire. A paperclip would work good and most have a high gloss shine. You can also get silver or gold wire from most beading supply areas! It is Dead soft, half hard and hard. The dead soft and half hard are a silver or gold alloy over a copper core...and there really isn't a need to worry about the copper leaching out once the ends are covered in solder. So how about a gold CE?!!!