Ah ha, do I know the product for you.
Renaissance wax. I use it on guns. It makes a S&W model 28 look like a model 29
Renaissance Wax is a brand of microcrystalline wax polish used in antique restoration and museum conservation. Most safely used to polish and conserve metal objects, it is also used on gemstones and such organic materials wood, ivory, and tortoiseshell. The product is sometimes used by reenactors to protect armor and weapons.