Great recipe for cold hued steel armor. Great for Barak Nar, Ironbreakers...
For a lighter-blue variant aka "gromril" just change the basecoat in step 1.

1. Basecoat/undercoat: Leadbelcher for "steel" or Grey Knights Steel for "gromril"
2. Wash: Gryph-charger Grey
3. Recess shade: Drakenhof Nightshade
4. Highlight: Ironbreaker
5. Glaze: Ironbreaker
6. Edge highlight: Stormhost Silver