After having really good luck with American Apparel polishes (like this and this) I thought I'd take a look at some of the other colours they had. I found a really interesting metallic duochrome in Smoke Dazzle. Silver in some lights, pink in others, it's a really interesting colour.
Above you can see how strong and pretty the pink is, the one below how strong the silver is. It shifts completely depending on the light which I'm a huge fan of.
The verdict: don't judge this polish on my application. These pictures are two coats over one coat of black and I rushed it and didn't clean up properly. It's so pretty, I'll have to redo this one better another time. If you're looking for a pale, silvery duochrome you could do a lot worse than this as it's opaque in two coats and has a really strong shift.