I began using Turtle Wax to the outside surfaces on my blued S&W mod. 19, while attending the San Diego Sheriff's Academy (1971.) Through the years in all kinds of weather, in California and NW Oregon, the wax has prevented any kind of corrosion. Interior surfaces were well lubricated with gun oils. I carried the Mod. 19 as my duty weapon from 1971 until 1987, when we were allowed to begin carrying semi-autos. Aside from a little holster wear that rubbed off some bluing, the finish is in excellent shape. Not just this one, but all of my blued firearms, handguns, rifles and shotguns, are protected with car wax.

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Retired Police, Life NRA