Metal, plastic, leather, and iron. I think depending on what car you are making and what part of the car it is.
I believe carbon fiber is the best material
Aluminum
Woven nylon straps are the best materials for car bras.
Glass beads.
It will be made of many components the casing material will not matter much.
If you want to build a car out of recycled and waste material, you should have knowledge on how a car is built. Working with someone who is familiar with rebuilding cars are key to making a successful car out of waste material.
that depends on the car part and what make of car it is
Fiberglass is a cheap way to do it. If money is not a problem, then "composite materials" is the best due to it's lightness..
They recycle the material and make car parts
The same material as your car or mine.
nylon is the best material for a kite or silk.
NAPA hand cleaner works the best. Just rub on your vehicle and it actually melts the material almost immediately. Then wash your vehicle as normal with car wash.