I use to do a lot of modeling but never got to the point of air brushing. I am going to be selling 20-30 models on ebay soon, just because I know I'll never get to them (purchased them at auction 10 or 15 years ago). I might suggest going to a ceramic shop or local art institute for some technique questions. I did find dry brushing a good technique to use on the small interior parts like insturment panels, etc. (apply paint to bush, then use paper towel to remove most of the paint to the brush, then as you pass the brush over the panel only the raised parts pick up the paint). Good luck and happy modeling. I wish I had the time to do the same. Also a question for you, what are you doing with completed models? I was looking at selling, but it is hard to ship and show how advanced your skills are, especially on ebay. I was thinking of donating the models to my local air museum if I can't sell them for a good price.