Originally Posted by Jim.Thompson
What the problem with that?
There is an extensive thread exploring the use of 2 pack PU foams on these forums. Conclusions are mixed, at best.
If you want light and strong, methods have been developed to achieve that. Non more so than by the DLG fraternity! I don't build DLG's (yet), but much can be learned from them.
They almost always employ two things proscripted on your list:
2. Vacuum bagging methods.
For what it's worth.
We go forth on the shoulders of giants!
And to add to that DLG wings are much higher aspect ratios rendering the task much harder opposed to warbird wings which are much thicker and shorter spans