So this is the process I used. First off was choosing which colours to use, from reading around it seems you can use pretty much any colour you want, and going by my nail polish collection I had quite a lot to choose between! There were 115 in there at last count....
So I eventually decided on these colours (as you can see I like Barry M!):
So you start off with a dark base colour. I used Barry M Black:
Because the glitter nail polishes I have didn't really seem right I also painted a layer of Gypsy Night from Topshop Nails:
Then using one of those foundation sponges I dabbed on three separate colours, in no particular order:
The glitter I used was Technic Carnival, which had a few too many colours in it and the flecks of glitter were a bit too large, so unfortunately it did ruin the overall effect:
Finished off with a layer of Seche Vite, my all time favourite top coat!