I believe Frying Pan Finish was created as a final part of the Tennifer process, possibly what is described in the screenshot above. The beloved texture is simply the texture of the metal underneath, likely sandblasted. Two reasons for believing this. I once polished the FPF off of a police trade in G32. The texture underneath was exactly the same as the FPF I started with. The other evidence that the texture is metal texture is right there on your FPF slide. Pop it off and look at the underside, near the Firing Pin. Smooth as could be, right? So why was Glock adding texture to slides by sandblasting them? I suspect because the QPQ process described above resulted in a very slick finish. It added a little bit of grippiness, though apparently not enough for some. If this theory is correct, it somewhat vindicates all the noobs who accidentally make the unholy mistake of calling Tennifer a ‘finish’. If anybody has a better theory I’m all ears.