Recipe for Servo-Skulls found on 40K terrain and other features

Priming

1. Prime the model Chaos Black

Basecoat

1. Base coat the cybernetic features Leadbelcher
2. Base coat the bone features Ushabti Bone
3. Base coat the eye lens with Khorne Red

Wash

1. Wash the cybernetic features and eye lens with Nuln Oil
2. Wash the bone features with Seraphim Sepia

Highlights

1. Highlight the raised cybernetic features with Stormhost Silver
2. Highlight the raised bone features with Screaming Skull
3. Highlight the central part of the lens with Evil Sunz Scarlet