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Rust Erasers for Carbon-Steel Knives

Rust erasers promise to rub away the unsightly corrosion that can build up carbon-steel knives. We tested five models to see if any would be worth buying.

What You Need To Know

Rust erasers, made from a rubber compound surrounded by a medium- or fine-grit abrasive, are designed to rub away the unsightly corrosion that can build up on and damage carbon-steel knives by removing small amounts of the rusted metal from the surface. (Rust should not be confused with patina, a beneficial form of oxidation that affects only the outer surface of the metal, turning ...