and have been wrong on a lot of things I have said previously. I kept trying to find faster and faster ways to clean the carbon from my barrels. I used Rem Clean on a rimfire barrel and after a few cleanings, it quit shooting. I think this goes to what Frank said way back on polishing. so, I tried the Rem Clean again in my CF barrels using a worn out brush and the 000 Steel wool. Just a few strokes and the barrel is spotless. What I have noticed is the Free bore, creeps faster so that has to mean the grit in the Rem Clean is scouring off metal. The barrels still shoot great tiny groups but one has to pay attention to the creeping free bore.
I do use Wipeout and find it to be a great carbon cleaner. Isn't as instant as the RemClean but it does take carbon out readily. So yeah, one can ruin barrels by cleaning too aggressively. There is a YouTube of a well known shooter cleaning his barrels with a Nylon brush on a cleaning rod driven by an electric drill. He states that that method does not hut his barrels and has had barrel makers check and then say he hadn't damaged his barrels. So, I clean my 30 barrels now after a match, around 80 rounds most matches and the .22RF,s well, they are a different animal. Some barrels don't mind being dirty and some want to be cleaned, from what I've seen so far.