I forgot to mention Mr. Gotteswinter. He has an excellent explanation of hand scraping I refer to in my many attempts to learn it.I think I subscribe to all of the above and I'd add Stefan Gotteswinter to the list.
AVE has his patter... it's a Canadian thing we learn as kids playing hockey. He is like the Machinist version of Letterkenny
AVE reminds me of the guys i worked around when i was an ironworker. Love it!