Starting in a buddy's reaver Titan that's been sitting in my closet way too long.
For the legs, I started with a black undercoat.
1. Sprayed a mix of Liche Purple and Codex gray in a mottled random pattern, then did a mix of Tallarn Flesh and Tausept Ochre in a mottled pattern.
2. Then airbrushed a random mottled pattern of blue, red and purple inks
3. Drybrushing with Boltgun Metal to give it a metallic sheen without losing its hue underneath