Can regrinding ruin razors metal?
Some time back I got an henckels razor from a barber near by, for amonst nothing. Since it was used and not cared for (lots of pitting and lots of barber use), I sent it to the only place in Israel that would accept to resharpen and regrind it.
I got it back with severe markings on the metal (from the stone), indicating low workmanship, and not even close to honed. I was very angry at them, but that was only aesthetics.
When shaving with it ( after honing and stropping, just as I do with my Dovo and filarmonica + HHT), I get a very uncomfortable shave and much more razor burn than before. The razor feels harsher on my face and not as soft gliding as the other two under identical treatment and soaps, even the sound is different.
Can it be that while regrinding the blade they heated the razor so much they ruined the original tempering process? thus changing the razors properties?