Black Ops: Smoke-on-the-Water NailsWatercolour nails go dark... with a black moon rising. And it's an easy DIY.Author:JanineUpdated:Dec 9, 2014Original:Oct 19, 2011CommentNow here's a watercolour nail effect for right now. By awesome Melissa Stormont at Tips Nail Bar & Spa, this is black nail polish and acetone over a white base, with, as Staff points out, a black moon... rising. Missed the watercolour-manicure tutorial? It's here.