Ice it is...

After a day of painting and trying different things, I've settled on a ice/crystal theme for the bases of my terminators.
I started from a black base coat and then put down a layer of Fortress grey. Then I did a layer of Skull White. I kept these layers relatively thick and didn't water them down at all.
Once the white had dried, I went back and dry bushed Ice Blue over the base. This took two seperate layers of dry bushing followed by a single layer of Skull white that was dry bushed on.