Here as a link to YouTube where an F250 aluminum body was in a wreck. Pretty interesting. It also stated that GM will be going to aluminum in 2019. Big Truck Big RV
Carbon fibre is rayon cooked in a de oxygenated oven (from memory) not fibreglas which is pulled /spun glass ,it can either be E glass -think glass fibre insulation or S glass (structural) which has the properties of carbon but heavier .