Just a few very tight patches,Its ammonia based like most copper removers so if paranoid i guess you could put a wet patch down to absorb ammonia.I'm picking any pitting caused by it would be from leaving in the bore.Ammonia is extremely hygroscopic.IE attracted to and dissolves in water,any left in the bore would be like having water in the barrel.
Have been using it in my 85 for 4 maybe 5 years? and cant see any pitting mind you I dont have a bore scope but if anything it keeps shooting better and better
It was slip 2000 I was thinking of earlier=shit didn't even touch the copper.
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