A few days ago I was looking an old car, from the 40's and he's been restoring it, and he had 5 other models that he was using as spare parts. I had a very close look at it and it strick me, the build quality of the car, the precise engineering of the parts, it's amazining to think how you go about building a car, and getting such parts to fit together. Some of the parts are in fact very complex 3D shapes, lots of different curves that merge into other curves, or joins that need to match up with over joins.
Does any one know how they used to make and or design body parts? I am thinking about from before they started to use computers, or CNC machines?
For example, how did they make a body part, and then make an exact mirror image of the part for the other side of the car.
Another example, How did they make a body panel so percise to match up with the lines of another body panel.
And how do you make the metal press to make the body parts.