The Dark Defender has a sheer teal jelly base with blue, purple and green flakie glitters. I used four coats and added one coat of KBShimmer Clearly On Top. SInce the jelly base is very sheer, I'd recommend undies in a similar color, if you're headed for a completely opaque finish.
Cadillacquer polishes are available at Hypnotic Polish and at Harlow & Co. If you live in Switzerland you can also order the polishes directly from Madeleine (Miss Cadillacquer herself) via Email on her Blog.