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Generally yes, if you blow the temper you can just do it all over.
That is why I prefer oil hardening steels. They tend to have no risk of warp or breaking, so the risk of having to do it all over...

Not in the way you are thinking of.
Auto tempering is something that is convenient if you are working in a production line process where throughput matters. However, it doesn't necessarily save you...

Basically, what he is doing is letting some of the heat in the spine flow back into the edge. This is called auto tempering. You have to be pretty quick to do it. What you do is quench the edge, pull...