In order to be close to the finished products and detect the actual effect of the appearance, a prototype must be made. After the hand model is well done, the hand model must be polished. What is hand model polishing? Hand model grinding is to grind off the rough edges, oil stains and dust on the wall or material surface, reduce the surface roughness of the product workpiece surface, and improve the adhesion of the coating after grinding the old paint film. Hand model grinding can be divided into traditional hand grinding and modern grinding.

由于一个手板模型零件在CNC加工后，它的表面在所难免的会造成许多的毛刺和刀纹。这时就需要人工的手工进行解决这种难题。一般大家会挑选打磨砂纸进行打磨，或进行打磨抛光。基本的外型解决有打磨，喷砂，打磨抛光，着色，丝印油墨，电镀工艺。手板模型打磨的加工工艺方式一般能够分：

Because a prototype part is processed by CNC, its surface will inevitably cause many burrs and knife marks. At this time, it is necessary to solve this problem manually. Generally, you will choose sanding paper for grinding or polishing. The basic appearance solutions include grinding, sand blasting, grinding and polishing, coloring, silk screen printing ink and electroplating process. Generally, the processing methods of hand model grinding can be divided into:

１、机械打磨：大规模使用时，为了更好地提升工作效能。

1. Mechanical grinding: in large-scale use, in order to better improve work efficiency.

２、干打磨：选用打磨砂纸进行打磨。过程中将造成许多烟尘，危害清洁卫生。

2. Dry grinding: select grinding sandpaper for grinding. The process will cause a lot of smoke and dust, endangering cleanliness and hygiene.

３、湿打磨：用水磨砂纸沾水或肥皂液打磨。水磨石能降低划痕，提升光滑度，而且省打磨砂纸，省劲。

3. Wet grinding: Polish with water, sanding paper or soap solution. Terrazzo can reduce scratches, improve smoothness, and save sandpaper and effort.

４、也有一种的打磨方式：“轻磨”，这时应取用较细砂纸及熟手进行

4. There is also a new grinding method: "light grinding", which should be carried out with finer sandpaper and skilled hands

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