-- Last Updated: Sep-02-13 9:31 PM EST --
... don't forget that Filson makes the same kinds of bib overalls and jackets as Carhart does, and with their wax treatment, they are reasonably water-repellent. In fact, Filson even makes rain gear made of waxed canvas (though it's a much lighter grade of canvas than what's in their work clothes). If it works that well for Filson, it stands to reason that a wax treatment would work pretty well on Carhart clothing too, if applied effectively, so I see nothing wrong with the OP's idea of making it more water-repellent than it already is. It's an idea that's been around a long time.
Pull-Up Strap Handle Kit
Kayak Kaboose Trailer
YakCatcher Rod Holder
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