Basecoat with an equal parts mix of Daemonette Hide , Rakarth Flesh , Kislev Flesh and White .
Mix the base colour 1:1 with Bugman's Glow , then glaze in some shading.
Add some Naggaroth Night to the above mix and further define shading.
Increase the amount of :white in the original base colour mix, then highlight. You might want to do this in a couple of passes, upping the amount of White further, and highlighting more selectively.
Finish with a few small White highlights.
Bone
Basecoat with 1:1 Rakarth Flesh and Wraithbone .
Shade with 1:1 Dryad Bark and Baneblade Brown . To make it more manageable, I like to thin the paint heavily with Contrast Medium and apply with a long thin brush.
Further define recesses with a more selective shade of Dryad Bark . I pretty much just use this stage to separate different bones, ribs etc.
Glaze highlights over all exposed areas with Ushabti Bone , to add some warmth.
Highlight with Wraithbone .
Finish with selective White highlights.
Black Cloth
Basecoat with Black .
Glaze everything but the recesses with 1:1 Black and Naggaroth Night .
Mix the above colour 1:1 with Eshin Grey and highlight.
Apply fine edge highlights of Stormvermin Fur .
Highlight more selectively with 1:1 Stormvermin Fur and Administratum Grey .
Add small highlights of Administratum Grey on curves and corners.
Finish with a few specular highlights of 1:1 Administratum Grey and White .
Black leather
Basecoat with Black .
Highlight with Incubi Darkness .
Apply fine highlights with 1:1 Incubi Darkness and Deepkin Flesh .
Selectively highlight with Deepkin Flesh .
Finish with specular highlights of 1:1 Deepkin Flesh and White .
Dark Brown Leather
Basecoat the leather area with Rhinox Hide .
Glaze most of the leather with thinned Mournfang Brown . Use quite a small brush and drag towards edges in rough lines. This should create some extra texture.
Add a chunky edge highlight of Skrag Brown to all edges.
Highlight everything again, this time with a fine line of Skrag Brown and Ushabti Bone mixed 1:1. This is a good mix to throw in occasional fine lines as scratches too.
With pure Ushabti Bone , selectively highlight corners and exposed edges of the leather. Put a dot of this colour where the additional scratched above meet edges too.
Add a little pure white (like Dead White ) to your Ushabti Bone and add dot highlights to corners.
Steel
Basecoat with Leadbelcher .
Wash with Nuln Oil .
Highlight with Ironbreaker .
Finish with selective highlights of Silver RLM01 Metallic .
I used the same basic method for the axe of the greem armoured Chaos Warrior, but switched out the Gryph-charger Grey for some Agrax Earthshade . This was just to make the steel look dirtier.