Given enough time, I have also worn off blueing and Parkerizing from guns. Especially in high wear areas.
I have reblued my old stevens shotgun 3 different times now matter of fact.
I understand why it's particularly bad for a camo to chip and scratch, but such is life.
I don't like it when my car gets dinged in parking lots either. It ticks me off to no end, but it still happens.