Et voila, like the French say.
Weathered my RX-79(G) Ground Gundam only by whashing it, drybrushing the weapons and thrusters, some additional dust on the feet and finally some soot below the thruster and knee vents. enjoy!
click on an Image to enlarge.
You might notice a crack on the face mask - I was shocked to see that!
besides that, my only complaints that I have - should have done a better job with masking the knee spikes and vent, but besides that, I'm totally satisfied with the work.