Veered away at the last minute from my old color scheme, and decided to go with an orange 'asteroid miner' look, which I think suits the semi-spacesuit look the later generation models have. From a color theory standpoint, the orange is a natural complement to the violet/purple/blue tones of the skin and chitin as well. Bonus!
The group has already been spoken for, and I've been asked to match their new owner's basing scheme which is a dusty concrete. Did the purestrain's bases up and it looks pretty sharp, might have to do more in that base color scheme in the future. Once these models are complete I'll be trading them for a new box of Deathwatch, which will provide some further conversion fodder for the Thousand Sons, as well as a second chance to do more cultists (utilizing some of the things I learned building/painting this set).