Heres a scratch built unit that mostly sits on a shelf. The black parts of the fuse are 1/32 sheet. Used sandable primer in a spray can to smooth it out then flat back. So far it weighs 45 grams. Probly too heavy to fly very well.
The t-craft behind it has sheet on the top of the nose. It was applied in narrow strips, then sanded down. Light weight drywall spackel as a filler.
The nose of the black one was done in 3 large sections. Different than the blue one. Both noses curve in 2 different directions. If you hold the black one up to the light, you can still see the different sections because of the distance between the formers. Strips would have been better for getting a smooth flow in both directions. Also, you can use a thicker sheet and that gives you more room to sand in a compound curve. Hope this helps.
thymekiller