I've got a few of the Rogue Trader marines finished now. In addition I kept some WIP shots of one of them.
Glueing and pinning stage.
After filling and finishing with Green Stuff a Grey undercoat is applied followed by Bestial Brown and Black (for any metals).
A beige is applied to the armour leaving gaps brown. The coating is intentionally patchy, this is just a base to improve the look of the yellow in the next stage.
I use three different washes at this stage (Nuln, Agrax andBaal Red) before chipping the armour with the tip of a fine brush in black and white/yellow before finally painting any icons or markings.