The look comes from essentially a white base colour, and then successive "washes" with different colours mixed 1:8 with glaze medium. Then pigments mixed with alcohol, then they are chipped with a sponge.
The bases are 40mm rounds and left very simple to fit in with the barren world they are fighting on.
From Curt:Beautiful work Byron. I love the grimy tones you've achieved on their previously white armour - fantastic. I assume these are destined to be Chaos Space Marines in the 40K mythos? I like that they aren't festooned with the typical tentacles, skulls and spiky bits - the restraint is nice. As these are significantly larger models than the typical 40K humans I'll score them as 40mm so 42 points total.