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I updated my rainbow nails! To see what my nails looked like before I added black click here: http://www.luuux.com/health-beauty/notd-rainbow-0?blog_id=44630
For the rainbow part I simply free-handed the stripes. Red was revlon hot tamale. Coral was essie haute as hello. Mint was sally hansen mint sorbet. Blue was revlon royal. Purple was sinful colors dream on.
Then when everything was dry, I added some tape over the rainbow parts. I painted over the tape with black which was sally hansen black out. I waited till that was dry and removed the tape.
photo is my own