Originally Posted by
Chaoschrist
Weathering might depend a bit on the type of army IMO.
As Phoenix01 stated, Marines I wouldn't weather that much bar some soot and maybe a minimum amount of mud or other sticky geological stuff that sticks around (snow, grass, etc). And also like Phoenix stated marines take a lot of pride in their armor. Quite sure that's not the case with Chaos marines though.
Orks in general, I'd weather a lot, whereas Eldar I wouldn't even consider weathering.
So yeah, it depends on the army.