How to choose the mesh size of sandpaper?
Jul 17,2026
When choosing the sandpaper mesh number, follow the principle of "the smaller the number, the coarser the grit, and the faster the cutting and removal of material. The larger the number, the finer the grit, and the smoother the polished surface." For rust removal, removal of thick welding slag, and large-area leveling of wood, choose 40-80 mesh coarse sandpaper; use 120-240 mesh medium sandpaper for eliminating rough sanding scratches, pretreatment of the paint surface, and light metal polishing; use 120-240 mesh sandpaper for fine priming and semi-matte polishing before painting. 320-600 mesh fine sandpaper; if you are pursuing a mirror-like high-gloss effect or paint repair, use ultra-fine sandpaper of 800 mesh or more. During processing, you need to grind step by step from coarse mesh to fine mesh, and do not skip the number. Only in this way can you completely eliminate the sanding lines left by the previous process and obtain a uniform and delicate workpiece surface.
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