If only it could be so easy...
 

http://fr.youtube.com/watch?v=FX8IUvs-9z4

I would make a much more aerodynamic car...

Denis.

Are you kidding?! Almost all of my projects involve cardboard and usually some wood.

You know what CAD means, right? Cardboard-Aided-Design! :D

Here's a great CHAIR made from cardboard. Maybe we CAN make cars this way!

http://www.youtube.com/watch?v=Luwc_ejaLjw

Polystyrene and epoxy aero shell with alloy subframe!

Heh. I love than video.

But why NOT form panels that way? Bamboo-pulp and recycled paper into a sturdy shell, mix flame-retardant chemicals into the glue, light epoxy final coat and paint...

Would it really be much flimsier than carbon-fiber, cheap thin steel or fiberglass mat? I mean, modern cars are designed with crumple zones, so I don't see a huge difference. You'd have to re-engineer the underlying frame a touch but it might be worth it.

all that commercial tells me is that (my sound is off) audis are made from cardboard,

Hemp and corn resin. Food starches and fibres. Coconut husk copra is good.

Squirrels might try and nibble the car.