How To Avoid Scratches (sand Marks) When Sanding

1. First of all, the reason that should be given priority should be the use of sandpaper with a grit number that is too coarse. For example, when the number 120 should be used, the master uses the number 80. In this case, when grinding, the coarser sand grains are very easy to scrape the sand marks. If the sand marks are caused by this reason, the master can change to finer sandpaper for grinding. Make the surface of the product very smooth and delicate.

2. Second, reverse grain grinding. There is a special kind of polishing object, which is wood, such as mahogany furniture, log furniture, etc. When polishing these furniture and other wooden products, it will be easy for inexperienced masters to polish against the wood grain. Sand marks appear. In this case, you only need to ask the master carpenter to grind along the pattern to solve this problem.

3. In addition, paint finish effect. Many painters will polish the workpiece when the paint or other solvents are not completely dry when the paint or other solvents are not completely dry. Due to the slow drying speed of dry solvents or paints and other paints, the paint film cannot be fixed. The time is dry, the upper paint film is too thin, and after sanding, it is not completely cleaned, so the paint cannot penetrate. In this case, when sanding with sandpaper, it is very easy to cause paint powder to remain on the surface, and some parts have no sanding effect, etc. traces of this movement.

The solution is also very simple, first of all, it is necessary to thoroughly study the dry solvent and paint, let them dry first, and then use sandpaper for further grinding.