Let me start of by saying that copper is my favorite metal. I love it so much that we had a custom engagement ring made for me in rose gold, before rose gold started becoming popular. When we made my engagement ring, there were NO rose gold engagement rings on the market. Now they are everywhere (of course.)
With that is mind, it would make sense that I would love copper nail polish. My mom posted a photo of a copper polish she had found at the drug store. Of course I had to get myself a bottle. Below is what I did with it.