Back in the early 80's my brother in-law purchased a brand new TC Renegade .50 for muzzleloader season in Mi. He was told all he needed was WD-40 for cleaning. We didn't hunt together that yr. so I didn't know. The next summer a conversation popped up about muzzleloading and I asked to see his new Renegade. When he handed it to me I could see it was a sewer pipe, no rescue possible except for a new barrel from Green Mountain Barrel (no longer available) $200 additional dollars he didn't have at the time. Moral of the story, don't clean BP without water and then after drying you may use WD-40. I use Ballistol and water after shooting and when I get home hot soapy water, dry and then straight Ballistol or any oil with rust inhibitors for storage. And for God's sake don't store your guns in the bsmt. unless it's heated and you run a de-humidifier, at least in Michigan!