Imperial Fists
 Undercoat Skull White
Yellow Areas
 Airbrush 50/50 mix Tamiya Flat Red/Yellow
 Airbrush 25/75 mix Tamiya Flat Red/Yellow
 Airbrush Tamiya Flat Yellow
 Airbrush 75/25 mix Tamiya Flat Yellow/Flat White
 Airbrush Tamiya Clear Yellow
 Wash with a mix of Humbrol Clear, Agrax Earthshade and Seraphim Sepia all thinned down
Black Areas
 Abaddon Black
 Highlight – Blend up to Mechanicus Standard Grey
 Final Highlight with Dawnstone
http://www.bolterandchainsword.com/topic/292010-imperial-fists-painting-a-noobs-plea-for-advice/?p=3714535