I think these are old CMG Protolene Khanate. Anywhoo, found them in a box covered in 8 years of dust, so time to apply some paint!
Bored with my 'çonventional camo' rebels I decided I wanted something brighter - so each role (recon, heavy weapons, etc) got a different colour armour suit with purple and yellowt the unifying theme. (No reason, I just saw they were unused bottles when I did my annual 'çheck and throw out dodgy paints' session)
The mechs merely got a boring grey but I tend to use my mechs for 15mm and 6mm sci fi so I don't go nuts with identifying marks as they swap sides/armies quite regularly. Practicality > Style.
Space wolves get a space wolves paint scheme, amirite?
The yellow power armour at the back could probably have more detail added, but I tend to paint to the level that meets my allotted timeframe.
The joy of 15mm is this decent-size force took under two hours, allowing me time to squeeze in and paint a second force (photos pending).