Adapted from Cult of Paint

1. Spray Chaos Black

Armor

1. Stipple all armor in increasingly lighter mix of Steel Legion Drab (replace with British Khaki ) and Karak Stone (add some scratches too)
2. Wash in Raw Umber , after 15min clean up the highest surfaces (like helmet, shoulder pads), add small pinwash with same oil wash to some deeper sections
3. Edge highlight with Karak Stone

Fatigues

1. Cloth in Black and ighlight in Eshin Grey
2. Leather in Rhinox Hide with Mournfang Brown highlights
3. Backpack, face masks and other metal parts in Exhaust Manifold with Ratling Grime wash
4. Grenades and other metal parts in Decayed Metal
5. <some other details like glow>

Basing

1. Sand and stone mix on the ground
2. Mix sandy AK liquid enamel pigments with some black charred dots