First: clean the surface; Second, the rough micro-surface provides a flat and fresh contact surface; Third, reshape the surface and adjust the texture.

The function of fine throwing:

First, a bright surface, and second, a protective layer.

Then the standard of rough throwing: the color should be uniform; The surface should be smooth, and the lines should be consistent, delicate and clean.

Fine polishing: shiny. If the light flows on it, you can't see the lines with the naked eye. The brilliance is the same (different). The whole is seamless. Protection should be in place and lasting.

Suggestion: You should make several templates, and compare and test them: 1, roughly throwing templates. 2 Single polishing template. 3. The roughness of the finished product is not in place; 4. Finish polishing the finished template. 5, Chacon and other questions template. Six advanced templates for senior high school and junior high school. Next is the job description. Only standards can provide accurate answers. Otherwise, you are a layman and can't become a climate.