Buying used muzzleloaders

[MAN IN BLACK]

Well I just bought my first muzzleloader last week. A .50 cal. Bobcat (I think) for $65. It was my birthday the week before I had free money so I figured I've always wanted one let's start here. I see signs of slight rust in the barrel but the exterior of the gun is in great shape. So Gil what is the proper way of cleaning a muzzleloader. I've heard all kinds of stuff. But I'm probably gonna take it apart this weekend and clean it and check it out.