Regarding unit insignias on Space Marines and other figs; I can either apply the decals that come with your figures, or handpaint on unit markings. Obviously, the decals will look far more uniform--but if you're doing an unusual unit, something from Chapter Approved or something, you may not have decals. If that's the case, send me a scan or a picture of the shoulder logo you want on the figures. I can copy pretty well, and should be able to make the unit look good! Pricing is the same as for fantasy/historicals that require shield designs.
Remember that while I hate to admit it, I'm NOT a 40K player, and as such haven't memorized the particular unit colors or logos. Likewise Battletech Mechs, or Warzone units, or whatever. Please give me very specific guidelines for how you want the figs to look! If you're trying to match figures you already have painted on your own, just send me a figure to use as a model, and I'll copy it.