These Plague Marines have a techno-virus/cyberpunk vibe.
- Prime with Necrotic Flesh because you didn't think ahead.
- Paint all the armor areas with Deepkin Flesh
- Paint the horns with Abaddon Black
- Paint the Tentacles and tongues with Calgar Blue
- Paint Trim and emblems with Gryph-hound Orange
- Think about what to do next...