I love terrain kits, and picked these up earlier this summer from another local, expecting to get around to them eventually to have more stuff for tables. Now with fortifications in 6th edition, I decided to get around to them sooner rather than later and did a quick job on them this weekend.
I wanted to keep them pretty generic, so they could fit in with many different armies and boards. So I went with a dirty grey, going for an old concrete look with metallics for the eagles and all the riveted areas. The weapon emplacements were just black with metallic over them, then dirtied up a bit.