That’s certainly how I remember most people in the island sharpening their machetes.You mentioned your wife
I have a work Sharp tri stone diamond sharpener system, I tried to sharpen my wife's knives but she's very old-fashioned and sharpens her kitchen knives with a file no less. I don't have any idea where she learned how to do it but it actually works. She does not want a super sharp knife. Oh well keeps my diamond stones in better condition I guess. I just shake my head in disbelief it could be a Puerto Rican thing.?
Likely translates well to carbon steel butcher knives. You get that toothy, scary sharp edge, won’t shave or push cut paper but will carve meat all day long.