It started eating them up. I posted pictures taken with my borescope. I don't listen to most of the panty waisted Internet Experts still living in mama's basement. I'm 72 years old, been in two shooting wars and can form my own opinions about things. I did not like what Sweet's was doing to my barrels following their directions and quit using it. Do you work for Sweet's?And it did what to them, or were you listening to some experts opinion who heard it or read it "some where".