Simple concrete paintjob with some weathering and flocking. Size markers are a 15mm robot and a 20mm figure.
Now onwards with the 15mm T-34, and I'm still looking for a 20mm one, but I'm working on a shoestring budget here, so no hopes for it anytime soon.
And in case you are wondering whats in the background, it is a excellent Blog by Sgt Scream >> http://smallscaleoperations.blogspot.de/ one that I thoroughly enjoy as he does all kind of moderns and sci-fi stuff. Go check it out!