I've now painted-up a fireteam & an AT RPG team of colonial combat androids. I'm very pleased with the colour scheme - it's straightforward to paint on such tiny miniatures; striking, but also plausible for the setting. To the right is the droid AT team, & below is the 4-robot fireteam. Click on the images for a larger view. As mentioned previously, the models are Rebel Minis Shalur Mercenaries.
I've also tried-out a 'jewel effect' on the visors of the UMC troopers (see right), which I think was semi-successful. The models are Rebel Minis Earth Force Marines. I'm still not 100% satisfied with the paint scheme for these human soldiers, but I'm not sure what it is - possible the camo scheme still needs work? Any suggestions welcome, thanks.