My wife has a cutting board she's fond of. Belonged to her parents, probably 50 years old. Now a cutting board gets pretty beat up and sad looking after half a century—a cross-hatching of deep gouges, some kind of black rot settling in one corner.
Nothing I couldn't clean up with 20 minutes of vigorous sanding with my gorgeous DeWalt orbital sander.
Which left the challenge of finishing the newly-naked cutting board. You can't use regular stain—it'll get in your food and poison you. But food-grade mineral oil, or block oil, does the trick.
I presented myself at the local Ace Hardware.
"Do you have food-grade mineral oil or block oil?" I asked, cutting straight to the point.
"Halfway down Aisle 18," he said.
More like most of the way down Aisle 18, but I found it, eventually, with help.
They had both, a large bottle—16 ounces—of Swan Mineral Oil. And a small bottle—8 ounces—of Bayes Wood & Bamboo Conditioner/Protectant. The first cost $6.99. And the second, $7.99. To be honest, I wasn't sure just what "block oil" is, so I read the label, which often cues a potential customer into the contents of a product. Here it explained that the block oil consisted of "100 percent food grade mineral oil."
Hmm, which to buy, which to buy ... I did the math, and saw that buying the mineral oil gives you twice as much of the same exact same stuff for a dollar less.
It would seem, in a world where consumers weigh their choices, read labels and think about stuff, that no one would ever buy the block oil. Obviously, we do not live in that world.