Wash with Nuln Oil . Adding glazes of Agrax Earthshade towards deep recesses, and where more interest is needed.
Highlight with mix some Silver RLM01 Metallic into the Exhaust Manifold and highlight. Do this roughly, with a mix of edge highlights and a few stippled marks.
Finish with some small Silver RLM01 Metallic highlights.
Visor
Basecoat with Khorne Red .
Shade around the edges with thin Rhinox Hide .
Build up a gradient towards the bottom left corner with Evil Sunz Scarlet , Troll Slayer Orange and Ice Yellow , covering a smaller area at each stage.
Finish with a dot of White in the top right corner.
Leather Apron
Basecoat with 1:1 Rhinox Hide and Incubi Darkness .
Shade recesses with some thinned Abaddon Black .
Add general highlights with a 1:1 mix of the base colour and Karak Stone . I would recommend applying all of these highlights with scratch lines and dots, to give the impression of texture, well worn leather.
Highlight with Karak Stone .
Highlight more selectively with Ushabti Bone .
Finish with a few specular White highlights.
The leather looked a little stark on corners and edges, so a glazed with a little Seraphim Sepia to add warmth, pulling by brush away from the brightest highlights.
Dark Trousers
Basecoat with 1:1 Abaddon Black and Dark Reaper .
Add chunky highlight of Dark Reaper .
Mix the dark Dark Reaper 2:1 with Ice Yellow and add fine highlights.
Increas the amount of Ice Yellow in the mix, so the ratio is now roughly 1:2 Dark Reaper and Ice Yellow . Use this brighter mix to selectively highlight.
Finish with specular highlight of pure Ice Yellow
Cloth
Basecoat with Karak Stone .
Add general shading with some thinned Steel Legion Drab .
Shade deep recesses with thin lines of Rhinox Hide .
Highlight with 1:1 Karak Stone and White .
Finish with a few very small/specular highlights of White .
Tan Leather
Basecoat with Steel Legion Drab .
Soft shade with a thin mix of Steel Legion Drab and Rhinox Hide .
Shade the deepest recesses with Rhinox Hide .
Highlight with Karak Stone .
Highlight more selectively with 1:1 Karak Stone and Wraithbone .
Finish with small highlights of pure Wraithbone .
Dark Brown Leather
Basecoat with Rhinox Hide .
Shade the recesses with some thin Abaddon Black .
Add chunky highlights of Doombull Brown .
Add fine highlights of Mournfang Brown .
Selectively highlight with XV-88 .
Mix some White into the XV-88 and finish with specular highlights.
Wood
Basecoat with 1:1 Dryad Bark & Mournfang Brown .
Run some thin Dryad Bark into deep recesses.
Apply chunky highlights with a 1:1 mix of the base colour & Karak Stone .
Now apply fine highlights with Karak Stone .
Finish with selective highlights of 1:1 Karak Stone & Wraithbone .