I studied gunsmithing, and this is my advice, if you ramp has machining marks smooth it with a 2000 grid by hand! (no dremel) until you smooth those marks then polish it by hand or rotary tool, also plug the barrel before do it. If you dont have any feeding problems or machining marks in the feeding ramp leave it as it is because the Black Oxide (Bluing) in the gun parts is a barrier of protection against corrosion.
I can tell a difference in my 1911 after firing tons of jacketed hp ammo and then using my handloaded cast ammo it tries to bind up sometimes from basically flat point tips if the hp ammo start to minutely put tiny pits into the frame feed ramp but they're just enough over time to try to stop my cast swc's. I do this once every couple months because I shoot daily it happens pretty quickly in my pistols when I wasn't shooting so much I didn't have as much of a problem I use a buffing pad and polishing compound on mine I ought to try that mothers brand out, I like using turtle wax buffing compound it works well for me but like you're displaying in the video being light and gentle with the pressure is key to not tearing up the angles and ending up needing a new barrel. Looks great nice and shiny! I always wipe down with oil after, my carry gun is so old the bluing has worn off and I wipe it down daily with oil to prevent as much rust as possible, after rebluing my beater three times I just gave up on the bluing lol gonna try cerakote next
