PURPOSE: To remove small protrusion and contamination on a plane and a curved surface without damaging the plane and the curved surface of a paint surface, particles for polishing are mixed in a plastic flexible material.
CONSTITUTION: A flexible grinding stone is pressed against an uniformly rigid plane to form a plane on the grinding stone. In this case, particle for polishing enters the interior of a flexible material from the plane thereof, and the edge of the particle for grinding is prevented from protrusion from the plane of the flexible material. When the low protrusion part of a paint surface is covered with the plane of the flexible grinding stone, a small hole is formed in the plane of the flexible grinding stone by means of the low protrusion and enters therein. Thereafter, the flexible grinding stone is repeatedly reciprocated along the paint surface. In the cut part of the flexible material, formed during the movement, since fine particles are not uniformly pressed in by means of the low protrusion, the particles for polishing are collided with the low protrusion to remove the low protrusion and contamination.
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