P-39s are my favorite WWII bird
I had one back in 1986 and I loved it. It was my first low wing airplane. I covered it with Econokote (low heat) film. Mine was powered by a Royal .40. If I ever do another one I will paint it with a foam safe paint.
I've also built a 1/5 scale P-39 (85" span) There is a picture of it in my photo gallery.