I am getting ready to run a France 1940 game using Combat Patrol(TM): World War II at Historicon in July. There is nothing like a convention promise to improve your painting throughput. This past weekend the weather was nice enough I could sit in the back yard and airbrush six French tanks I recently purchased from Shapeways. 1:48 scale vehicles are difficult to find, but Shapeways had the ones I wanted.
At this point the tanks look pretty pristine. I like them that way, but the next time I get out the airbrush I may weather and dirty them up a bit.