Painting these guys is actually quite simple. Start with a Black undercoat (use spray to get many done at once and achieve a more even coat).

All the ribbing was painted with Liche Purple, and lightly drybrushed with Liche Purple/Tentacle Pink. The black plates were then touched up where I had over painted. The black armour is now highlighted by painting a thin line of Chaos Black/Blue Grey around the edges.

Paint the face plate with Space Wolf Grey, and blend highlight with Skull White. If you go over the edge then simply repaint black and try again! Once the white is done you can paint the eyes Blood Red.

Now the gun and other gold bits were painted Shining Gold, inked with Rust Brown and drybrushed with Shining Gold. Finish off the base and you're done!