About 20+ years ago I was at a friends house and his dad came home from work (iron worker). He tell his son to get the razor blades and rock salt and sits down at the kitchen table. Then he proceeds to cut the blisters on his hands and pack them with rock salt.
With my eyebrows raised, I asked why are you doing that? He said, "its the fastest way to build calluses".
I miss Uncle Sonny....
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