Can anybody recommend a good barrel cleaner solution that really gets rid of carbon that has been left in a barrel for a long time. I have used Remington Bore Paste but I really want to limit it's use because of it's abrasive nature. Received a Model 19 S&W from a family member but it has been really neglected. And I can not get this barrell clean, it's starting to tick me off. Any suggestions would be greatly appreciated.