My nephew showed up last night and asked if I woild help him clean his ml. It's a T/C Hawken in 50 cal. He told me it might be a job and that he hadn't cleaned it since last December when he shot several times. I haven't looked in the barrel but the are around the lock is rusty. What should my first step be to loosen up the crud in the barrel? I gave him a pretty good tongue lashing and told him to go home and I would take care of it but now I'm thinking I will call him over and let him learn how hard this is gonna be. Thanks for your help guys!