https://thearmypainter.com/en-gb/blogs/explore/the-army-painter-academy-horus-heresy-iron-warriors

Armour

1. Primer - Matt Black Air Primer / Spray Can
2. Drybrush - Metallic Heavy Metal
3. Wash - Light Tone
4. Wash - Wash Grimdark
5. Edge - Plate Mail Metal
6. Recess - Voodoo Shade

Black and Hazzard Stripes

1. Basecoat Matt Black
2. Edge Crow Hue
3. Highlight Ash Grey
4. Yellow Stripe Inner Light
5. Wash Light Tone
6. Yellow Highlight Daemonic Yellow
7. Edge Space Dust

Gold

1. Base True Brass
2. Wash Strong Skin Shade
3. Highlight True Brass

Bullets

1. Base Evil Chrome
2. Wash Dark Skin Shade

Lenses

1. Base - Dragon Red
2. Highlight Raging Rose
3. Edge Matt White