Here is my first try at Saran or Cling Wrap nails. It is super easy, and I didn't have to worry about being neat. I used Chelsea King's YouTube video here. I used Ciaté Big Yellow Taxi and SinfulColors Pink Forever, then I added Essie Pure Pearlfection.
The basic idea of saran or cling wrap nails: 1. Paint your base color and let it dry (or let it dry a little bit...I wasn't that patient); 2. Paint your second color over that; and then 3. Lightly dab wadded up cling wrap over the nail to remove the top layer of polish in some places.