Adapted from Goonhammer https://www.goonhammer.com/how-to-paint-everything-adeptus-custodes-shadowkeepers/

1. Prime Chaos Black

Base layers

1. Base with very thinned layer (or drybrush?) of Rubber Black (or Panzer Dark Gray / originally?)
2. Base cloth with Mephiston Red
3. Wash with Nuln Oil
4. Drybrush cloth with Mephiston Red
5. Drybrush with Evil Sunz Scarlet and then Wild Rider Red
6. Clean up armor red spillover with Rubber Black

Details

1. Undercoat gold sections with Leather Brown
2. Gold in Bronze
3. Red details (ribbons, gems, etc) in Khorne Red
4. Pipes and rivets in Sir Coates Silver
5. Tassle in Ivory
6. Shade all details in Nuln Oil
7. Shade tassle additionally in Agrax Earthshade
8. Layer gems up with Khorne Red then a dash with Mephiston Red and put a Bold Titanium White dot in top left

Armor highlights

1. Edge highlight all armor corners in The Fang
2. Lighter edge highlight in Fenrisian Grey

Weapon

1. Handles/details as above in grey, gold and red
2. Very lightly (to have the black undercoat show through) drybrush spear or axe blade with Mephiston Red then Evil Sunz Scarlet then Wild Rider Red .

Head

1. Helmet as other armor.
2. Eyes in Khorne Red with a Khorne Red glaze to have spillover lighting
3. Plume in Ivory then Blood Angels Red with Agrax Earthshade wash