RE: for that 'in service' look
Alright - exhaust stains, heat stains, leading edge paint peeling...
1 masking
2 that is a brown base and rust paint
3 chrome yellow for the unburned hot oil stain
4 second layer brown
5 semi gloss for the center
6 all 3 layers
7 top view
8 leading edge - aluminum paint
9 foot prints and wear marks on the wing
Weathering is very important - airplanes in a "new' condition just don't look right to me. I try to simulate a combat ship, right at the time of their duty cycle.