I started things off with a base of China Glaze base coat topped with two coats of CG "White Out".
You'll notice that my fingers are a little shiny. I was going to use cuticle oil to block the excess polish this time, but in light of our fruit fly problem (which has since been controlled, thank goodness), I decided to use petroleum jelly instead (no scent). For the record, it worked great.
Then I had the brilliant idea to use glitter polish for swirling. I'll save you the whole sordid story, but just FYI - CG Ruby Pumps and Tinsel do *not* work for water marbling. I started over with Pure Ice "Platinum" and Sinful Colors "Ruby Ruby". Much nicer.
And voila! Peppermint swirls, all cleaned up.