And after much fiddling with colors, I seem to have settled on this...
They look pretty good, definitely look like bad guys, but I will admit that it can be a bit hard to pick details out on from table height. In the end, though, I just wasn't happy with anything lighter or higher in contrast, especially the face masks, which seem to have to be black despite my wishes to the contrary.
(And yes, the bases still need to be landscaped, I just didn't feel like doing it. You get what you pay for around here.)
I generally want to do figures this small in lighter shades and lots of contrast, but going too light with bad guys is a tricky venture - you can go with an all-white Imperial Stormtrooper look, I considered doing them in red, but the one was too derivative and the other too impractical, which of course are criticisms that are completely interchangeable.
Given that the underlying theme for this faction's aesthetic, what with the halftracks and coalscuttle helmets is to conjure up images of jackbooted thugs I really didn't want to wander too far from grey and brown, and in the end, I pretty much stuck to grey and brown.
The miniatures are good enough to do whatever your skill can do with them, though The surface detail doesn't get lost, takes washes well, and has innate separations to guide you around the project. It's a lot of work for 15mm miniatures, given that an internalized reason for doing this scale in the first place is supposed to be speed, but that said, all five took about what I would have spent on the same figure in 28mm scale getting to the same effective level of detail. Good thing I'm not in a hurry.