If I had a better memory or could use the search tool more effectively, I probably wouldn't be posting this, so forgive me. I need to de-carbon the throat and first few inches of a rifle of mine. I have Isso paste and their brushes. It seems like I remember a thread where a barrel manufacturer said that using any brushes with Isso could damage a barrel? Could someone steer me to it? What is the best way to use Isso and not damage the barrel? Thanks for helping me out.