I dont think that is glitter on that cake, I think it is some kind of sugar crystals or something like that. The glitter that i use is much finer than that and I use vodka. I cover the cake, brush lightly with vodka and then sprinkle glitter and its fine. This however looks much bigger and heavier than glitter.
It's not glitter, it's sanding sugar. You can spray your fondant with a little water, or brush with corn syrup mixture. Then, you just press the sugar on the cake with your hand. You will have a lot of it fall of during this process, but just scoop it back up and re-use.
I also think that cake is covered in sugar crystals.. Not glitter. Theres a Wilton book with the very technique and the directions call for just painting the cake with piping gel, then covering it with the sugar!
Thanks everyone for your responses. I'll give it a shot and let you know how it turns out.
I am making it for a friend's daughter's baptism this weekend.
I would paint with piping gel and then use your hand. I always like to put a piece of parchment paper underneath so you can then take the paper and funnel the excess back in your container.