Well, I am seriously behind schedule, but nonetheless I'm pleased with how this sergeant came out. The final "Horus Green" I've settled on is a 2:1 ratio of VMC Pale Greyblue to VMC Gunship Green. This is painted over a basecoat of pure Gunship Green, and edge highlighted with white.
The base is made from cork and baked Sculpey that I made into a tile pattern. I'll post up how I did that later this week. The theme I'm going for is the shattered ruins of the Precentor's Palace on Istvaan III.
I've got a lot of work to go if I'm going to make the first throwdown challenge this Friday- back to work! :)