I've had to "re-learn" basic modeling skills on this one.......I was all set up to spray the Panzergrau on the outside of all body parts when I thought about first cleaning my airbrush. It's been a while since I really used it, so I thought it was probably clean enough, especially since I was spraying flat paint. As you can guess, I failed! When spraying the front bonnet and both doors the brush began to spit so everything got shut down for an intense cleaning session. I did get the main shell painted before the problems started, so there was some progress........however, I'm now re-sanding the other parts and the airbrush will be sparkling clean when I go back to the paint booth.