>>8853845Vallejo black wash for the, well, wash
Vallejo oiled earth wash for a followup
Vallejo rush wash applied very very lightly for the final one in some parts
Privateer Press Greycoat Grey for the undersuit adjustments and the inner thighs
Privateer Press Pig Iron for small touchups of some parts, like the upper center of the breastplate
Tamiya Weathering Kit for redoing the chest scorch mark and adding some light scorches here and there
And then topped with two to three coats of Tamiya TS-80 flat clear to seal it all up and take away some of the plastic-y look and make him nice and matte (don't forget to cover or remove the visor for this part!)