Shot of Unit 1; made from a combination of the old plastic fantasy Chaos Warriors and Chaos marines.
I painted them with a mix of colours so the group would fit better with Unit 2.
Shot of Unit 2; All of these marines are converted loyalists, including the champion, whos just had a head and torso swap.
After painting 5 marines white and getting tired of it, I decided to indulge, and used paint from just about every pot I own. All too often I've bought an interesting, bizarre colour only to find it months later unusable in the pot (which is why I'm moving over to vallejo paints).
With a totally mixed up paint scheme the marines go quite nicely with the pirates I converted up for use as cultists, and in my head, I think of them all as renegades and deserters from chapters and warbands, each with their own story.
The guy in the middle's been bouncing around on his own for years and finally has some mates.
Filing off all of the iconography was a bit of a pain. Some of the heads are straight swaps for chaos marine heads, and some of them are the original heads (securely fastened as part of the single piece figure), where it was simpler to just glue on some horns.
Catachan parts made these marines look more like renegades.