Interesting. I was thinking of adding maybe brass or copper for the casings of the splinter rifles, and perhaps dark (caliban) green for the drug vials.
Out of curiosity, why cyan? This is only my second army-wide custom colour scheme, and I'm keen to learn. Both so far have had very little in the way of very radical contrast, and been kind of deliberately muted and dark.
With these guys, I'm a little cautious about making them too detailed, as I want to add some battle damage (just sponging on some brown, etc).
Also, am I expected to try to drill out splinter rifle gun barrels? Because I don't want to.