Prime

1. Spray with Leadbelcher (or Grey Knights Steel ?)

Base

1. ? Zenith spray with Stormhost Silver
2. Paint (? spray?) all armour with Enchanted Steel
3. Paint undersuit in Abaddon Black
4. Dry brush all Enchanted Steel areas in Stormhost Silver

Body

1. Embossed lettering, skulls, dagger, books in Brass Scorpion
2. Edge of embossed books, chest embossing backplate, in Khorne Red
3. Selectively run Nuln Oil into recesses (dulls armour shine, so don't just wash over. Go directly into resseses

Backback

Same as the body, but with the following:

1. Exhaust rims in Brass Scorpion
2. Bottom side vents/outlets in Brass Scorpion
3. Controls at top in Leadbelcher (possibly somthing lighter like Stormhost Silver or Ironbreaker ? With controls a different colour?)

Pauldrons

1. Same as body, embossed elements in Brass Scorpion , side of embossed books in Khorne Red

Stormbolter

1. All metal in Leadbelcher
2. Gun body in Khorne Red
3. Ridges to rear of sight in Brass Scorpion
4. Embossed design on right of gun in Brass Scorpion
5. Wash heavily with Nuln Oil , especially around/in the magazine

Power Sword