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.

由于一個手板模型零件在CNC加工后，它的表面在所難免的會造成許多的毛刺和刀紋。這時就需要人工的手工進行解決這種難題。一般大家會挑選打磨砂紙進行打磨，或進行打磨拋光。基本的外型解決有打磨，噴砂，打磨拋光，著色，絲印油墨，電鍍工藝。手板模型打磨的加工工藝方式一般能夠分：

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、機械打磨：大規模使用時，為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：選用打磨砂紙進行打磨。過程中將造成許多煙塵，危害清潔衛生。

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

３、濕打磨：用水磨砂紙沾水或肥皂液打磨。水磨石能降低劃痕，提升光滑度，而且省打磨砂紙，省勁。

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

４、也有一種的打磨方式：“輕磨”，這時應取用較細砂紙及熟手進行

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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