RE: Large composite shell using molded balsa
The bandages are removed after cure. Examination with a light source in a darkened room shows a shape that is pretty darned fair. A bit of lightweight spackle and careful sanding should produce good results.
Ultimately the temporary frame formers will be removed through the wing saddle and cockpit opening, but for time being they must stay in place until the outer layer of glass is applied.
FWIW, each half shell with glass inside weighed 16 oz. This gives a projected total shell weight with one layer of 2.3 oz on the outside surface of 42 oz. Additional localized reinforcement will bring that weight up - perhaps another 12 to 16 oz. Not super light weight, but pretty reasonable given the size of the shell and the rigidity of the structure.