This part is already polished on my pistol since 7k rounds ago when I decided to smooth my trigger. Also the part of the trigger bar that interfaces with it. After 7k rounds and while ckecking it today I found excessive wear on it (not the trigger bar). Truth being told, I forgot about the polishing and NEVER oiled it all this time. Pics attachedd
The case hardening on these parts is quite thin - you may have polished through it causing excessive wear.
I put a few dozen rounds through the PPQ today with it removed - no issues at all (although it makes me remember why I don't shoot the Walthers much anymore.).
Video to follow.