I really didn't catch the details of the four processes, especially the last one, but this is amazing. They built a 40% scale model of a Miller 91 entirely with 3D printing.

http://www.youtube.com/watch?v=K1zV8JMwrvs#t=25

Since when is a Miller 91 OT on IOW? About the most beautiful car to run the Speedway pre-WWII. Maybe ever.