Star Wars Escape Pod - getting rusty

Okay, over the pastels i've put on a thin wash of Games Workshops "Snakebite Leather", my colour of choice for rust.
I've then gone in with a stronger, less diluted version on a small bruch and laid that into cracks and crevices.
And i've put a wash of black into the ribbed section that goes around, to make it pop a bit more.
Next up is more of the same and then onto the REALLY rusty colour