Your 442 is an aluminum alloy frame w/a steel barrel & cylinder so those products should suffice. That's how I've maintained my Model 38 for well over 40 years. One other thing, buy a silicone cloth and wipe the gun down daily, especially in the summer, to keep rust at bay. I used to wax (any liquid car wax) my blued guns but I'm not sure how that will work on the newer finish of your 442.
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Old Cop
LEO (Ret.)
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