It isn't quite rainbow, but I only had three metallic colors for this week's A Weekly Dose of Rainbows "metallic rainbow" theme. I am also using this mani for Digit-al Dozen's Negative Space week. I did a drag marble using two L.A. Colors no-name metallic polishes and Kleancolor Metallic Green, leaving the half moon area blank; then added a bunch of silver triangle studs for some fun accents.
