My interpretation of this famous crusader order. The decals come courtesy of the fine people at forgottenchapters.eu and their "Crusader Orders V3" sheet.

White Cloth

1. Basecoat with 1:1 Celestra Grey and White .
2. Mix your base colour 2:1 with Dark Reaper , then add some general shading to the cloth. Thin with a medium of your choice and be quite generous.
3. Increase the amount of Dark Reaper in the above paint so it is now 1:2 base colour and Dark Reaper . Use this colour to more selectively shade the cloth.
4. Add extra definition with pure Dark Reaper in exceptionally deep recesses or where the cloth meets other materials.
5. Mix the original basecolour 1:1 with White , then highlight.
6. Finish with pure White highlights.

Dark Brown Leather

1. Basecoat with Rhinox Hide .
2. Add edge highlights to everything and volumetric highlights with Doombull Brown .
3. Selectively highlight with XV-88 , using the big highlights from the previous stage as a guide.
4. Finish with very small Screaming Skull highlights.

Wood

1. Basecoat with Thondia Brown .
2. Shade with Rhinox Hide .
3. Highlight and add woodgrain with a mix of 2:1 Thondia Brown and Steel Legion Drab .
4. Take the above paint and mix it 1:1 with Administratum Grey . Now use this for fine highlights.
5. Increase the amount of Administratum Grey again, then add selective highlights.
6. Finish with a few specular highlights of pure Administratum Grey .

Argent (Silver/White) Tincture

1. Basecoat with 1:1 Celestra Grey and White .
2. Shade with pure Celestra Grey .
3. Mix Stormvermin Fur into your Celestra Grey and enhance the shading. Finishsing with pure Stormvermin Fur where needed.
4. Mix the original basecolour 1:1 with White , then highlight.
5. Finish with pure White highlights.

For the chipping, I added dots and scratches with Dryad Bark , then underline with White .

Chainmail and Steel

1. Basecoat with Leadbelcher .
2. Wash with Nuln Oil .
3. I also like to enhance the shading in recesses and where areas of steel need separating. For this I typically use glazes of Agrax Earthshade .
4. Overbrush and highlight using Ironbreaker .
5. Finish with selective highlights of Silver RLM01 Metallic .

Gold Details

1. Basecoat using Retributor Armour .
2. Shade selectively with Reikland Fleshshade where there are details or recesses that need more definition.
3. Add some Silver RLM01 Metallic to the Retributor Armour , and highlight selectively.
4. Finish with a few dots of pure Silver RLM01 Metallic .