A Barlow Out of the Ground and the Case for Ultrasonic Cleaning

Someone dug a folding knife out of the ground. It was caked in mud, it would not open, and the question was the obvious one: should I soak this, and in what?

The best answer was a sequence rather than a single product. Rinse and scrub off as much of the mud as possible first, then put it in an ultrasonic cleaner for about five minutes. If you do not own an ultrasonic cleaner, spray it with WD-40 and let it sit for an hour or so before working the pivot. Both approaches do the same thing: they attack the packed grit and dried crud around the pivot instead of asking a rusted joint to move dry.

What the thread did not recommend is the thing most people try first — opening it by force. On a knife that has been in the ground, the pivot is a lap for abrasive particles, and prying a blade open drags that grit through the washers and the tang. Even if it opens, you have just sanded the action.

The identification was the second payoff. Commenters placed it as a granddaddy Barlow, probably a Camillus. That matters because the Barlow pattern — a long bolster, a simple handle, one or two blades — is one of the oldest and most reproduced American working-knife shapes, and it is the kind of knife that turns up in garages, tackle boxes, and apparently in the dirt. Several users recognized it immediately because they owned one, including one whose grandmother had just given him her late husband's mini Barlow, carried through decades as a city fireman.

That is the real value of a thread like this. The knife is worth almost nothing; the identification, the cleaning sequence, and the half-dozen people who pulled matching knives out of their own drawers are worth the post.

Verdict: rinse, ultrasonic or WD-40 soak, then work the pivot gently. If the blade still will not move, it needs a pin knock-out and a proper clean, not more force.