How to paint Nebula/Space

I was surprised how quickly the mural came together.  I consider it the "make or break" piece of the Deathwing Land Raider.  "Sure anyone can paint up a Deathwing Land Raider and throw it on Ebay.  How does mine stand apart?"  That is the question I had when I thought of Ebay'ing a Land Raider at the end of '10.

Decided Deathwing Land Raider would have The Rock painted on it with El'Jonson's sarcophagus surrounded by Watchers in the Dark.

Might have wondered why this side hasn't been painted.  Here it is.