On the Ren wax, do you have to "degrease" the metal before you use it?
While I wouldn't apply it to an oily gun, it does cut through old wax and oil to reach the wood or metal. In fact, I would call it a more clean wax because it doesn't leave the gun feeling slick like other waxes often do. And yet, the shine is excellent.
It was developed as a synthetic wax by the British to protect centuries-old museum pieces.