Thanks for thinking ' outside the box ' on that last post.
I just watched a show on an exotic top secret flying wing aircraft from WW2 called the Horten 229 .
Most of the aircraft was made from wood, and compound curves were done using thin sheets of flexible wood paneling , with bolts and wood glue holding it together.
Simple wood putty can also be used to form smooth edges and curves.
Balsa wood is extremely light.
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