The flat face of a clamp will press evenly against a square piece of edging.

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The flat face of a clamp will press evenly against a square piece of edging. But when you need to clamp a curved-profile edge molding, such as a bullnose or quarter-round, curved-profile clamping blocks will save the day.

To make them, cut some 3x4" blocks from scrap pieces of 34 " plywood. Next, crosscut a thin section of your edge molding and scribe the profile of the molding onto your clamp blocks as indicated in the drawing above. Cut this shape in the plywood with a scrollsaw or bandsaw and sand the cut edges smooth. Now, slip the blocks between the workpiece and the clamp jaws and tighten the clamps.
—Julien Kogej, Alameda, Calif.