Crankshaft polishing - backyard method

[dom14]

I found below videos are pretty interesting, not just for crankshafts, but similar applications of any kind.

Preliminary Crankshaft Polishing Method (https://www.youtube.com/watch?v=j7DZxqPUQto#t=2.456847)

Crankshaft Mirror Polishing (https://www.youtube.com/watch?v=jMrMbDrxNq4)