1. For the deep scratches on the case or band, it is necessary to do some local treatment before repairing. Look at the location, such as the case side of the case, or even use a fine small file. More importantly, use an oilstone, and then under the magnifying glass, carefully boring the deep scratches. If there are deep scratches, it is necessary to use an oilstone to polish the parts first. When the scratches are basically polished off, they will be polished , choose the sand paper with appropriate grain size, and grind along the original sanding pattern. Only a little bit of it can make the grinding effect more realistic.

2. If you want to remove the scratches on the watch case and strap or make a renovation for the watch appearance, you can refer to this method. Linear shape of the grain is easier to do, if the grain is concentric, it should be done using electric machinery.

3. It's not difficult to repair the scratches on the watch case strap with sandpaper by yourself, as long as you are careful and steady, you can do it well; however, if the surface is a polishing process, you must use a cloth wheel polishing machine, ordinary people can't do it.

4. For the case and strap with both sanding and polishing process, sanding and polishing should be done before finishing. Only the finished sanding parts need to be covered. Rubber paper can be used for simple ones, and metal mold plate can be used for regular ones, which is also used for covering during polishing.