One of the many uses of MMO, known since forever, is to prevent corrosion on tools.  There is one tool, however, which is probably more severely affected by corrosion than most, but is usually not treated at all to prevent corrosion.  That tool is the razor.

Back when the double-edged “safety razor” was the main shaving tool, and some enterprising folks were telling the gullible they could keep their razors sharp by putting them in little pyramids aligned just so, my father told me about something that really did make razor blades last longer.  A a man he knew had told him he made his blades last longer by taking them out and drying them off after each shave, then wiping them with a rag that had some gasoline on it.  My father pointed out that this would prevent corrosion.

Because a razor’s edge is so extremely sharp, it doesn’t take a whole lot of corrosion to dull it.  As everyone knows, moisture promotes corrosion.  And the plastic multi-blade razors which have largely replaced the old safety razors, retain a lot of moisture, as you can determine by trying to dry one out after using it.  You can whap it on a dry paper towel again and again, and water will keep coming out.  Shaking the razor and blowing through it also help get the water out.

Most of the benefit seems to be simply from getting the thing dry, but I then give it a swipe with the corner of a paper towel that’s a bit oily with MMO.  I imagine most any kind of oil would do, but I’ve been using MMO as a light lube and penetrating oil for decades, so that’s what I used here.

Experiment has shown that either way—simply getting the head dry immediately, or following up with even the merest swipe of oil—approximately doubles the life of the razor.

OK, even if everybody and his uncle swipes their razors with MMO after drying them off, it won’t boost the sales of MMO perceptibly.  But still—it seems to be a case where simply preventing corrosion has a very noticeable practical benefit.  Especially if you use those really fancy razors with more than two blades.

Yep, I actually lay my razor (one of the fancy Gillette 5 blades...) in a little saucer of baby oil.  Keeps it lubed up.

I thought about using MMO, but errred on the caution due to the line “Contains chemicals known to the state of California to cause cancer, birth defects” or however it’s worded LOL.....wouldn’t wanna break skin shaving with the “solvency” of MMO LOL......given, it is only a light solvent, but still a “solvent” none the less

Of course, the main thing as far as preventing corrosion is concerned, is getting rid of the moisture.  Greasing up the blades after they’re dry is probably overkill, though in a very humid environment it might help a bit.  You could probably use any kind of oil or grease—baby oil, petroleum jelly, what have you.  I use MMO because I have it handy, and figured it would penetrate and get at least a thin film of oil all over the edges of the blades.  Perhaps (talk about overkill!) air tool oil would offer superior protection against corrosion.
:-D

Even if the blades aren’t dry, immersing them in oil prevents corrosion in a different way, by cutting them off from the air.  No oxygen, no corrosion.

Those fancy multi-blade jobs usually have strips that supposedly contain some sort of skin lubricant.

It occurred to me that whatever you grease up the blades with might affect the plastic mounting; but in my case I use so little oil I’m not worried about it.  Likewise, the tiny amount of solvents (mineral spirits (paint thinner) and orthodichlorobenzene are the ones I recall being in MMO) in the thin sheen of oil I wipe onto the blades doesn’t concern me.  The paint thinner has probably all evaporated before I use the blade next anyway.