Out of curiosity, did you get any photos before the fiberglassing/bondo stage? Would just love to see how much of this was additional sculpted detail on top of the papercraft, though I can imagine it's probably even more than I think!
I am sorry, but I didn't. It is paper, (pepakura) then fiberglass resin. Once resin in hardened I apply bondo, then epoxy clay. I will make a tutorial on my next project that I start from scratch.