Lee,
The All American Sr has no dope at all.
The plyspan is applied with Balsarite direct to the bare wood. Then a few coats of polycrylic. Then sandable gray auto primer, auto basecoat colors. then auto clearcoat to finish it. So, far not a concours effort (not expected on an oldtime}.. but not bad either.
The jury (me) is still out on if I would do it this way again.
The Super Duper Zilch, pictured in the Zilched or Zilchschmidt thread here and on Stuka, will have the traditional dope/talc type finish.