There are many rifles and scope bases with JB Weld as the bedding material out there. KIWI shoe polish and min-wax used as release agents. Never an issue. I have used it with other bedding materials as well and works for those products too. On steel, a dremel or pencil grinder with a fine wire wheel will remove any stubborn epoxy left over. There is a clean up process that goes as the pieces are going together. Alcohol and Q-tips are your friend.