A friend gave me some lead remover cloth. This one is from Birchwood Casey and there is another product called "Lead-Away". I realize that they shouldn't be used on blued surfaces nor on CCH surfaces. I've been amazed at how they clean off the burn marks on the front of a stainless steel cylinder (not that I really care about removing such marks); also equally amazing to me is how they can remove lead deposits from inside the chambers. Can anyone tell me: 1) can these cloths damage anything with that level of cleaning power; 2) can they be safely used to remove lead build-up from chambers and barrels; 3) what chemicals (for lack of a better word) is infused into these cloths to make them work so well? THANKS, J