In spite of what I have written in the post above, I am considering using a traditional silk and dope or silk and water-based polyurathane finish on the Big Guff, but then what do I do with a few yards of Olive Drab Solartex?
The Chairman of my club when I lived in England used ladies' polyester dress lining material when covering his vintage model.
PS. Joe.
The Guff and the Big Guff were different animals!
The Guff was a free flight, proof-of-concept model, with a six-foot polyhedral wing. The Big Guff had an eight-foot wingspan and was designed for radio control from the outset.
https://outerzone.co.uk/plan_details.asp?ID=2319
https://outerzone.co.uk/plan_details.asp?ID=7456