For the flesh I use an undercoat of Chaos Black spray followed by a base coat of Orkhide Shade then all but the recesses in Knarloc green, I then highlight Goblin Green. This is it for the rank and file. For characters I add a further highlight of 50/50 Goblin Green and Bleached Bone
For the metal I again start with an undercoat of Chaos Black spray then I base coat it with Tin Bitz, dry brush with Boltgun Metal, wash with Devlan Mud and then a final light dry brush of Boltgun Metal again.
Give it a go it looks good