I did a brief research about fiberglass, and it's sheaper not just in materials (sheets & resin) but it can also be shapped more directly, without need a negative mold made from a smoot positive mold.
https://www.rqriley.com/frp-foam.htm
Is fiberglass lightweight and resistant enough for a solar vehicle similar to Morelli shape, lke Solarworld No.1 ?
I'm also curious about hte silico composite made used in Aptera. Any video or text about how is used, the process for shaping ?