POLISHING DRILLED HOLES

A properly drilled hole has a smooth semi­matte finish that can be brought to a high polish. A Vical acrylic or metal rod approximately 1/8" smaller in diameter than the drilled hole is split to a depth equal to the depth of the hole plus ˝"and mounted in a drill press. If the inner surface of the hole is rough, steel wool or strips of emery cloth or sandpaper are wound around the rod and gripped in the slot. When the inner surface is smooth, a good grade of flannel is wound around the rod and the compounds described above for buffing are applied. Poor grades of flannel may throw lint and require further cleaning.

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