This is how we went about Painting Our Sentinel.
Spray the whole model with GW Chaos BlackSpray the whole model with Plasti-kote Hunter Green 2115Heavy Drybrush with GW Catachan GreenMedium Drybrush with GW Goblin GreenLight Drybrush with GW Camo Green
Paint all metal With GW Boltgun MetalWash all metal with GW Wash Badab Black
Paint Hot Metal(Exhaust & Plasma End) with GW Tin BitzDrybrush Hot Metal with GW Boltgun MetalDrybrush ends of Hot Metal with GW Chaos BlackDrybrush lightly with GW Mithril Silver
Paint Plasma cell GW Skull WhitePaint Plasma cell GW Ice blueWash plasma cell with GW Thakra GreenHighlight with GW Scorpion GreenFinal highlight with GW Skull White
Paint emblems with GW Codex GreyPaint emblems with GW Bleached Bone
Paint lights GW Regal BluePaint lights GW Regal Blue/GW Hawk TurquoisePaint lights GW Hawk TurquoisePaint lights with GW Codex Grey dotWash light with GW Asurmen BluePaint light with GW Skull White dot
Paint base with GW Chaos BlackDrybrush base with GW Codex Grey Drybrush base with GW Codex Grey/GW Fortress GreyDrybrush base with GW Fortress GreyPaint outside of base with GW Charadon Granite