The Scrap Dogs! A space pirate band for Solar Empires

I've got about 20 of these Games Workshop Chaos Cultuist for Warhammer 40,000 which I picked up to used as a pirate band.  The only problem is that they only come in five poses so I'm doing some conversion to add some variety.
These guys will be called "The Scrap Dogs" and will be from the Asteroid Belt.  I've got a mech I'm working on for them as well.  I'm trying to make them look like scavengers which I think the cultist are pretty suited for.  The only problem is that I got the first group together and base coated before I figured out what I am doing with them and I intend to add some scrap piles to their bases.  I think I can just work around the painted ones and either hand paint the junk piles on their bases or hit them with another coat of spray paint.