I stole a lot of the method for the skin from Juan Hidalgo on YouTube. I winged it for the rest of the elements.

Pale White Skin

1. Basecoat with Wraithbone . I used the spray for speed.
2. Wash the skin with Magos Purple , thinned with twice as much Contrast Medium .
3. Paint the fleshy bits with 2:1 Volupus Pink and Contrast Medium .
4. Add small highlights of Kislev Flesh to the flesh bits only.
5. Re-apply Wraithbone as chunky highlights anywhere you feel they are needed.
6. Add sepective highlights of Pallid Wych Flesh .
7. Where the skin needs some extra pop, add small and specular white highlights of White Scar .

Purple Carapace

1. Basecoat with Naggaroth Night .
2. Wash with Nuln Oil , dragging towards the recesses.
3. Add chunky edge highlights of Naggaroth Night mixed with Genestealer Purple to all of the plating. Also add striations on the edges of large plates with the same chunky lines.
4. With Genestealer Purple , edge highlight it all again with fine lines. Place these fine lines within the striations from the last stage too.
5. Continue with selective highlights of Genestealer Purple and Wraithbone mixed 1:1. Make these highlights very small or even specular highlights. These should be placed on the edges of the striations too.
6. On points and sharp corners, you may want to add dots of pure Wraithbone too.

Dark Red Bone Claws/Weapons

1. Mix Abaddon Black and Khorne Red , then basecoat the area.
2. Now glaze towards the lightest area, using Khorne Red . I did a couple of passes, to ensure they were a good colour.
3. With Evil Sunz Scarlet , add chunky edge highlights to everything.
4. With Wild Rider Red , edge highlight it all again with fine lines. Place these fine lines within the striations from the last stage too.
5. Selectively highlight edges with a 1:1 mix of Wild Rider Red and Lugganath Orange .
6. Finish off with small amounts of Lugganath Orange , on points only.

Yellow Eyes

1. Basecoat the eye with Averland Sunset .
2. Highlight a smaller area towards the front with Dorn Yellow .
3. Finally pick out a specular highlight with White Scar .

Teeth

1. Pick out each tooth with a couple of layers of Ushabti Bone .
2. Add a smaller layer of Wraithbone to make each tooth look more cylindrical.
3. Finally, add specular highlights of White Scar to the points.