Carry guns- real carry guns- get beat to death. if they aren't dehorned by your gunsmith, the steeringwheel of your car and every door jam in your life will get around to it.
I've parkerized about a hundred guns. My experience is that parkerizing is soft- you're dealing with millions of little peaks of metal around the craters the beadblasting left. Those peaks get worn off quickly.
The gunsmithing shop I used to work for eventually went to "kotes" for pretty much every carry gun they built.