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... How matt could that be if it's semi?
Wurger,
OK, what is a good idea?
Blacklist
The dry brushing of the exhaust pipes. For making of the exhaust stains you may use the airbrush. But you should do that without exaggerating methinks.
Nope. The "dry brush" technique for the exhaust pipes is better than the airbrushing. It is better because these are the small pieces rather. But the exhaust stains on the fuselage can be done with an airbrush. However it's up to you what way you can decide to choose.