finish wear

Hi All, New Sig owner here and might just be overly concerned since my Glock owning friends have little wear after much more ammo expenditure. This past weekend i took my p229 Enhanced Elite to the range and put 120 rounds of Winchester White Box 115 Gr through the barrel without any failures...

I recently polished the chamber on my P226 Tacops where it shows through the slide when its at full battery. I did this because the finish on the area was wearing off and it was just generally starting to irritate me. I know its a natural occurence that its going to wear off I just figured it...