Sorry. I read too fast. As suggested above, a fast method with a good return is the rusty metallic: 1. Prime in black 2. Base color in mournfang brown 3. Add some washes of rhinox hide. This does not need to be homogenous 4. Dry brush with blazing orange (or Troll slayer orange for a more recent GW colour) 5. Dry brush with leadbelcher 6. Dry brush with ironbreaker or runefang steel in the more exposed surfaces Edit: added paint names
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