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"If need be" . . . You have some corrosion already --

. . . After you dry the blade and pivot, and do 10 laps on the strop to dry the edge,

. . . . . put a drop of mineral oil on the blade,...

Any mineral oil (gun oil, pharmacy "mineral oil USP", baby oil, anti-corrosion oil) will work on the blade.

Clean it after shaving, strop it 10 laps to dry the edge, put a drop of oil on the blade...