After polishing the piece of skin quality was found to be two similar pieces. If you use the micro-camera that surface quality padu sakho of better old pieces.
After sanding the workpiece surface quality of the workpiece, the two pieces are similar. If you use a microscope to see the quality of the workpiece surface is better than the old job.
After the polishing surface quality of workpieces were both pieces are similar. If the use of the microscope showed that the surface quality of the workpiece's new better workpiece old.