1. Prime with Chaos Black .

Metal Components

1. Base coat all metal components with Gunmetal .
2. Recess shade using Agrax Earthshade to pick out any details and define lines.
3. Generously highlight with Aluminum .

Black Casing

1. Edge highlight all with a chunky line of Dark Rubber .
2. Highlight again and add any cosmetic marks/scratches with a thin line of Thunderhawk Blue .
3. Highlight any upwards facing edges or corners where the light hits with Wolf Grey , at this point you can also highlight any cosmetic marks/scratches.
4. (Optional step) You can add any wear and tear to edges with Aluminum , be selective here and use very thin lines.