Talking About Sand-Grinding With Mold-Saving Polishing

1. Grinding with sandpaper to save mold and polishing requires the use of soft wooden sticks or bamboo strips. When polishing round or spherical surfaces, a soft rod can be used to better match the curvature of the round and spherical surfaces. Hardwood strips like cherry wood are more suitable for polishing flat surfaces. Trim the ends of the slats to match the surface shape of the steel sheet,

In this way, it is possible to prevent the acute angle of the wooden strip (or bamboo strip) from contacting the surface of the steel sheet and causing deeper scratches.

2. When using different types of sandpaper, the polishing direction should be changed from 45 to 90 degrees, so as to be able to distinguish the streak shadow left by the previous sandpaper after polishing. Before replacing different types of sandpaper, you must carefully wipe the polished surface with a cleaning solution, such as 100% cotton dipped in alcohol.

Because the small grit left on the surface will destroy the subsequent polishing work.

3. In order to avoid scratching and burning the surface of the workpiece, special care must be taken when polishing with #1200 and #1500 sandpaper. Therefore, it is necessary to apply a light load and polish the surface using a two-step polishing method. Polishing with each sandpaper should be performed twice in two different directions.

Light, turn 45 to 90 degrees between two directions