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The differences between grinding and polishing processes are as follows: 1. Different concepts. Grinding is a type of surface modification technique; it generally refers to a processing method that uses rough materials (such as sandpaper containing particles with high hardness) to alter the physical properties of a material’s surface through friction, with the main goal of achieving a specific surface roughness. Polishing is a processing method that uses mechanical, chemical, or electrochemical means to reduce the surface roughness of a workpiece, thereby achieving a smooth and shiny surface. It is a process of modifying the surface of a workpiece using polishing tools, abrasive particles, or other polishing media. 2. Different properties: Grinding makes the wall surface smooth and even, which is beneficial for painting. Polishing means to smooth out the surface and make the wall shiny. In other words, grinding makes the surface of an object smooth, while polishing gives it a shiny finish. 3. The coarseness of the abrasive varies; the smaller the number, the finer the particle size, while the larger the number, the coarser it is. 8000# represents the finest grade. The jade is ground and polished, using coarse grinding followed by fine polishing, resulting in a very shiny piece of jade. Polished glass, gems, jades, stainless steel, and stone can achieve a mirror-like finish. Polishing is a processing method that uses mechanical, chemical, or electrochemical actions to reduce the surface roughness of a workpiece, thereby achieving a smooth and shiny surface. The requirements for polishing are even higher!