Ok, mine came in yesterday and here's what I did after reading this thread.
The finish on it was fine but it also had the coating on the feed ramp. I did not try to polish it up The moving parts were stiff as hell and wouldn't move at all. I lubed it up good
with oil and got everything moving ok. The threads on barrel and protector were dirty so I cleaned them and oiled them good too.
I then installed it into a brand new, never fired, 92A1 and racked the slide a lot over several hours. It loosened up pretty good after a while.
I couldn't make it to the range today so I loaded 3 rounds each into 2 magazines and went into the back yard. Put the first mag in and racked the slide and the round fed fine. Then fired all 3 rounds, all worked as supposed to. Put in the second mag and dropped the slide, round fed just fine. Finished the mag and that was it.
I will get to the range over the next few days so I can shoot several hundred rounds to beak it in.
I'm happy with it.