I just finished my first weathered airplane, a Revell 1:48 scale B17. The last time I built a B17 was 56 years ago when I was 10 years old. I think back then the model was a "box scale" model. That was a real glue bomb, plus I painted it with a brush.
I do not have an airbrush so I painted this B17 with Tamiya rattle cans. The bottom is Light Ghost Gray. The top is Olive Drab with light mist coats of Light Gray and Tan. After painting the model. I used a gloss clear coat and added the decals. I weathered the model using a variety of washes, including The Detailer black and rust, Vallejo desert dust and dark lhaki green, Testors createfx black and Tamiya smoke. I blended the washes with a very thin filter of artist oil paint. I then painted a few wing and body panels with olive drab to simulater recently repaired panels. The main landing gear wheels are resin. This not an easy model to build. A lot of flash had to be removed and one has to be real careful not to not break-off the guns after the model is finished. I am really pleased with the final results.
The bottom of the model was weathered and I added some aluminum foil to simulate newly repaired panels.
This is the third airplane model that I have built since I was a kid. The other two models are two jet fighters. You can see in this photo how large the B17 is.