This here is one of my long term projects: a 1/8th scale remote controlled Mitsubishi Eclipse. I don't feel like going into much detail currently, but in this part I will be taking a 3D model of a 2nd generation Eclipse and creating a scaled mold that can be used in a vacuum former to create a shell for the car. A 3D model was very hard to find for free, but I did eventually find one.
The next step is to create the carbon fiber base chassis to fit the shell. This method (basing it off of a real car) makes it so much easier to design the car as not everything needs to be created from scratch. As for creating the actual shell, i'd need to get a hold of a vacuum form machine.