Basics

1. Basecoat with Grey
2. Put mud on the base using Vallejo Diorama Effect Brown Earth

Armour

1. Warp Lightning all over the armour - no need to worry too much about being precise, there will be plenty of time to repair it.
2. Edge highlight using Warp Lightning , but with a drop od White added.

Details

1. Use Black on limb joints
2. Mix German Camouflage Pale Brown with Flat Red , in a roughly 1:1 ratio. Use it to paint the helmets and the "crests" on arms.
3. Paint the weapons, magazines and the back "belt" (the one with advanced texture, as if stuff was hanging there) with French Mirage Blue
4. Follow this with Strong Tone