If there are scratches or slight scratches on the mirror surface of the watch, you can first drop a drop or two of water on the mirror surface, then squeeze a little toothpaste to wipe it, and then wipe it back and forth with a cotton ball to remove the scratches and make the mirror surface as new.

Surface scars and local deep scratches on the watch case or strap should be polished with an oilstone first. This needs to be done under a magnifying glass. The purpose is to smooth out the scratches. When the scratches are basically smooth, choose sandpaper with appropriate granularity and polish it along the original sanding grain. Usually this grain is radial with the dial as the center. Therefore, this is a meticulous work. It takes a little effort to get a good realistic polishing effect. It is recommended to use sandpaper in jewelry industry.