Car-apace

Instead of using fiberglass and metal, bio-engineering and vehicular engineering design could be fused to produce a lovely, aerodynamic, iridescent car body made up of strong-but-light chitinous-like material. A carbon-fiber web-structure would form the underpinning, and guide the growth of the chitin material, which would molt and self-renew through the seasons. Dents would self-repair. A nutrient substance could be applied in place of wax, or with a sufficiently sophisticated feeding system built into the webbing, just dumped into a hopper to be distributed to the underside of the shell by capillary action.

Bonuses could include gull-wing doors that, under certain aerodynamic conditions, do that low-level buzzing that some insect wings do. Bugs which splash across the windshield and front of the car could conceivably be absorbed into the chitin system and recycled.