1. Prime black ( Black Primer , Black , Matt Black )

If dry brushing

1. Zenithal dry brush Highlight part 1 ( Mechanicus Standard Grey , Neutral Grey , Dark Grey )
2. Zenithal dry brush highlight part 2 ( White Scar , White , White Grey , Ivory , etc)

If airbrushing

1. Zenithal highlighting with airbrush (any white, White , White Scar , etc)

For most armor

1. Apply a thin coat of Steel over the zenithal highlighting
2. Apply two coats of speed black ( Black Legion , Hospitallier Black , Grim Black etc)

For hands, power fists, imperial icons

1. Apply a coat or two of Grey Knights Steel

For weapons (bolters, plasma, etc) and clan/shoulder icons

1. Apply two thin coats of Blue Grey Pale (.905)
2. Shade with a dark blue ( Drakenhof Nightshade , Blue Tone , etc)
3. Apply two thin coats of Pale Grey Blue (.907)
4. Apply 2+ thin coats of white ( White , Cold White , White Scar , etc)

For dreadnoughts

1. Any exhaust bits use Exhaust Manifold
2. Las cannons and the like are tinted blue via Magnesium and blue washes ( Drakenhof Nightshade , Blue Tone , etc)
3. The outer sarcophagus uses Burnt Iron
4. The viewport uses Necro Gold or Viking Gold
5. Missile tips are either speed red ( Baal Red , Slaughter Red ) or base red ( Mephiston Red , Blood Red )

For purity seals

1. Apply ivory ( Ivory , Wraithbone ) to both parchment and seal
2. Add two washes of sepia ( Seraphim Sepia , Sepia Wash , Soft Tone ) to parchment
3. Add contrast red ( Baal Red , Slaughter Red ) to the seal
4. Add dark wash to seal ( Dark Tone , Nuln Oil , etc)