This is one of my favourite combinations! Of all the glitters out there, Mac makes the best one! Not too light, not too intense. I have three of them, but the one I use most often is grey:
First, I use a tiny eyeshadow brush to put the glitter glue on one lid, crease to lashes. Then I dip the same brush (with the bit of glue left) into the pot of glitter. Tap off the excess into the sink and then tap onto the lid lightly. Repeat until you get the desired look.
Here was the result on me: