Tenifer/Nitrate is not the black finish you see on a Glock.
The factory glock finish is either Tenifer (pre 2012) or Nitrate (post 2012.) The Nitrate finish is pretty cool IMO. I have found it to be pretty durable and see no good reason to get rid of it unless it has failed.
What are they exactly??
I want to refinish the Frame only, no slide. I'll leave the slide black. My wife wants a pink pistol. I'd like to get her a G43 and paint (cerakote, duracoat, whatever) the frame.
They are the metal treatment that occurs before the black finish is applied.