As for the priming, I always use XF-1 flat black from Tamiya. I try to cover all the surfaces, specially the retired corners, which never get the basecoat and the weatherings, and i think its a good pre-shading technic as well.
I surfed on the Internet last week and i found the real Hans! Yes, its true, he was almost bald, just a little hair on his scruff :) And how bizarr, this photo made in Czech,1945.
And here is the miniature Hans. I didn't paint too much details, he will be just a "supporting actor". The flesh-tones are darker than usual, cause he will sit into the cabin, so I calculated with the light conditions.
The next step is to paint the basecoat of the interior...I take a big breath...pics soon :)