I had an experiment with nail foils. I like the result, but they can be difficult to use. The set I have comes with a 2 in 1 base and top coat, and you definately need it. Especially as a top coat, otherwise it starts to peel.
Anywho, these are my attempts with them. First: disco nails!
Blue and Gold. I really like this one, it looks sort of regal.
Blue - Collection 2000 Maxiflex (Electric Punk)
Gold (french tips) - Avon Mirror Shine (Gold Foil)