Painting was simple. so here is a relatively simple guide! Army Painter dragon red undercoat, boltgun metal on large areas like the tracks and rolla and dry brush on some wear to the red, once dry add dabs of the old flesh wash to the metal areas. Badab black was the entire model.
Details - scratches done in mithril silver, i only add these to areas where badab black has slightly pooled as it make it look like battle damage. Also tip any spikes with mithril. All yellow details were done freehand in slightly watered down Iyanden darksun and then more dabs of flesh was added to the bolts etc for rusty details. All tracks and wheels are sporadically dry brushed with scorched earth for that muddy look.
As for the crew - ill do a post on the steps i take to paint all my Orks in the future :)