I would suggest you consider not painting the base colours on, especially the cloth, and instead drybrush them over a black primer.
This creates greater shade and variation of tone than the wash can achieve by itself. The foundation paints are great for this - the thicker consistency is a gift for drybrushing.
Here's an example (these take me approx 4hours for a squad, so about 25 mins each)
All colors are drybrushed on, a few details picked out (belt buckle, snaps on pouches, etc) then a wash of Devlan over everything.
Automatically Appended Next Post: Ruckdog wrote:(I go this route as most modern small arms are flat black)
That's so last millenium - brown is the new black!
http://images2.wikia.nocookie.net/wikimag/images/f/f9/FN_SCAR-L.jpg