I keep reading that coatings don’t last. I have a Renoir brand
copper bracelet from the 50’s. It is woven, wide strips in one
direction (the warp for you fiber people) and wire in the other
(weft). It flexs a lot when I put it on and take it off. Its a
gorgeous shine orange-y copper color with black in the recesses.
Any ideas on what/how they made it not tarnish for 60 years while
still being flexible?