Straight off the Warhammer TV Painting guide for Khorgus Khul.
Paint the whole model Khorne Red
Paint the Nobbly bits and claws Eshin Grey
Two coats of Nuln Oil
Highlight red, with more Khorne Red
Highlight again with Tuskin Fur
Highlight Dark areas with Dawnstone Grey
Brass Effect is Balthasar Gold, wash with Agrax Earthshade, then highlight with Necron Compound
Sword is Chaos Black base, drybrush Mephiston Red, drybrush Wild Rider Red, light drybrush of Averland Sunset
Bone is Karak Stone, wash with Agrax Earthshade, highlight with Ushbati Bone, then Screaming Skull
Add Blood for the Blood God for effect