Thanks for the comments, folks!
And for Terryb: I used Citadel Base Death Guard Green for the Giants in Miniature uniforms. I used Vallejo Model Color Panzer Series US Olive (70.887) for most of the web gear, and Citadel Base Death World Forest for rucksacks, etc. I know the Citadel stuff ain't historical, but they give the right colors for my tastes for these figs.
FYI, I use a strictly acrylic paints from several manufacturers, applied with a hand brush. I shade using a black wash with a mix of ink wash and floor finish. I then drybrush the highlights with a very light tan. Then I apply a matte varnish. As you can see, I do a very basic neutral flock on the bases. This process works for me, anyway...