The 'How It's Made' series has been fabulous and interesting to say the least.
I didn't realize it was on YouTube...this will have to be investigated further. But, on another note, my fascination with manufacturing processes extends to the question - How did somone discover this was the best method for doing this?
Think about it for a moment. The chemical baths described in the video. What was the process of discovery. As an example, using oil to drill a hole in steel, is actually contradictory in description, but clearly works in practise.
The manufacturing is one thing. The discoveries that led up to process is amazing as well.
Things that make ya go hmmmmmmmmmmmmmmmmmmmmmmmmm?