Basic Recipe for Iron Warriors with a purple tint

Primer

1. Chaos Black

Metal Armor

1. Basecoat armor plates with with Iron Warriors
2. Basecoat chest and backpack cabling with Iron Hands Steel
3. Basecoat Armor details with Balthasar Gold (Backpack vents, shoulder pad trim, belt buckles, aquelias, etc.)
4. Shade all previous steps with Targor Rageshade
5. Edge highlight grey metals with Iron Hands Steel
6. Edge highlight warm metals with Runelord Brass

Armor Joints

1. Basecoat with Black Legion
2. Highlight with Mechanicus Standard Grey (Character models only)

Shoulder Pads (Bare)

1. Basecoat with Naggaroth Night Abaddon Black (70/30 Mix)
2. Thick edge highlight with Slaanesh Grey
3. Edge highlight with Daemonette Hide

Hazard Stripes

1. Basecoat area with Averland Sunset
2. Highlight yellow with Ushabti Bone
3. Layer in stripes with Abaddon Black
4. Highlight black with Daemonette Hide
5. Shade with Seraphim Sepia

Details: Eyes, Wires, Lenses, Etc.

1. Basecoat with Mephiston Red
2. Highlight with Evil Sunz Scarlet
3. Dot highlight with Fire Dragon Bright

Bolters

1. Basecoat bolter with Iron Hands Steel
2. Shade bolter with Nuln Oil
3. Basecoat bolter casing with Black Legion
4. Highlight bolter casing with Mechanicus Standard Grey
5. Highlight bolter casing with Dawnstone