Anyway, these are the colours I used.
I used the No7 Just Black as a base and sponged on small amounts of the other colours. I used the plastic wrapping off my Glamour magazine to allow me to get as little as possible on my sponge and not make too much or a mess (a perfect use for something I'd usually just throw away! Recycling at its finest!).
These don't look as good as some of the others I have seen but I do love the effect you get and I'm going to practise a little more with different colours. I do think Jack Frost is the perfect top coat for this effect though, it looks gorgeous over the top and is just glittery enough.
What do you think? Has anyone else tried this kind off effect? I'd love to see them!