Eldo (cool name) Hmm -the military was more hoarding metal...hence the spruce goose by howard hughes. i think that's the start of fiber board type pieces... various plastics got developed to be structural components. but metal was a commodity. they needed it for tanks, jeeps, planes, weapons...
  BTW  - gov't.  encouraged people to grow hemp for the navy ropes.  best rope in the world.  the US Navy made a short film called "hemp for victory" and ran it in theaters..