my Sig in 9mm has the nitron finish
and "wet" or "dry"? never heard a pistol called that
when I clean my pistol I wipe it down with CLP hit the rails with a drop
or two as I reassemble it. Never had ANY issue with it. And I have put
UPWARDS of 2500 rounds down this pistol so far. Only thing I have replaced
was the stock poly guide rod with a custom Bedair Stainless guide rod. Made a huge difference in the groupings as the stock guide rod was sloppy.
Not sure why they went poly on that part, only thing I can think of I would recommend doing differently.