1 coat over an OPI black (can't remember which, but it's a creme and basically just a plain black):
This. is. so. cool. It turns any color into what seems like an entirely new polish look. I see a lot of nail art possibilities with this polish. When I saw swatches online and people raving about it, I didn't really see the appeal. I bought it anyway to try it myself, and now I get "it". It's gorgeous, glittery, and dare I say... the next evolution of glitter?