[Christ]

I also suggest that for a DIY'er, plastic is probably a more viable option to prototype engine parts than most metals, and can be had in larger quantity by digging through your neighbors' trash! LOL.

Considering that grocery bags get thrown away in the thousands every day in many communities, and they melt easily in olive oil at ~240* (as opposed to 1000+ for metals), and reform into a very dense plastic, which can then be chemically plated or coated with high-temp ceramics, etc... all things that a DIY prototype engineer could achieve in his home "lab".