Credit to Garfy
https://taleofpainters.com/2020/07/tutorial-necron-warrior-occiputek/

1. Prime black
2. Paint torso and limbs with Castellax Bronze . Lahmian Medium helps flow
3. Paint torso and armor sections with Leadbelcher
4. Mix 3:1 Nuln Oil Contrast Medium and wash all over
5. Same as step 4 but with Agrax Earthshade
6. Reapply Leadbelcher on light-facing parts (can drybrush)
7. Highlight Castellax Bronze sections with Brass Scorpion
8. Fine highlight of Stormhost Silver on silver and bronze parts
9. Chonk highlights of Mechanicus Standard Grey on black weapon
10. Celestra Grey finer highlights
11. Repeat step 3 on the weapon
12. Paint the "barrels" Kantor Blue
13. Paint energy cell and thick highlight barrels with Teclis Blue
14. Barrel highlight with Lothern Blue
15. Use thinned Corax White on the chest emblem and head
16. Use Wraithbone on Corax White areas
17. 1:1 Skeleton Horde : Lahmian Medium wash on white areas
18. Highlight white areas with Screaming Skull
19. Snakebite Leather into the deepest recesses of white areas
20. Wraithbone edge highlight
21. 1:2 Temple Guard Blue : Lahmian Medium make glow around chest, eyes, ribs, power core
22. Use Ulthuan Grey to paint eyes, chest icon, ribs, and power cell