C-clamps can make nasty dents that are tough to sand out. Pads or block will prevent this, but they’re often awkward to hold in place while you tighten the clamps. I make pads that don’t require extra hands.
I bought a roll of 1-inch wide adhesive-backed magnetic strips from a craft store and cut off a number of long lengths. I adhered these strips to 11/4″ wide pieces of 1/4″ plywood. Using a miter saw, I cut these pieces into shorter lengths as needed to fit the C-clamp jaws. I store my magnetic pads on a steel strip that I screwed to the end of the bench. The pads are ready to go whenever I need them.—Peter Smith
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