I hadn't made bangles before but when I found an old sheet of copper left over from a long ago build, bangles seemed like the obvious thing to use it for. For the inner layer, which would probably be in contact with human skin all the live long day, I figured deerskin would work best. It's hard to match for comfort and friendliness with skin. For the first bangle I made an outer layer of veg tan and the second a layer of stoned oil. I'm happy to say that both worked out pretty darn well and the copper strips are so ductile that the bangles are very easy to adjust.