here's the stuff I used, in case anyone wanted to try it. Picked them up
at JoAnn Fabrics on sale.. I think most were under $1. But I'm sure that
any acrylic paint would work. I had some black acrylic from a hobby store.
Painted the whole thing black first (thinned with water, just need a dark
background) Didn't get a solid black blank, it just helps to deepen the copper.
After af ew minutes I blotted it with a paper towel so some of
the black showed through.
I used an acrylic spray over that so the next coats didn't soak in.
Then I slopped on a combination of the blue and green, not very
well mixed. That way you get some aqua spots, some green, some blue.
After about a minute I wiped this off in one direction only. That way
it left the blue/green in the hollows as the cloth skipped over them.
But where it was well wiped, the black and copper showed through.
After that dried, I put a little more of the copper on my fingertip and
with the lathe running, I lightly touched it to the blank to leave some
copper on the highlights. Pretty simple, really.