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I don't see why not, tea tree oil is a mild oil that uses include polishing wood & mold control, I have never heard of anybody using it on their razor but I'm sure it should protect it. P.S. Walmart...

It never hurts to use a bit of oil after every use, but I don't think that everybody has to. A lot depends on the razor's usage and the humidity levels. I guess if you start to notice rust, it's time...