To give a smooth, lustrous surface to.

当然，任何表面光滑的白纸都可以用。

youdao

Experiments show that the method is capable of micrometer-scale machining without heat affected layers and stress, and obtaining smooth lustrous surface.

实验表明，该方法可实现微米级无应力加工，并且被加工表面十分光亮。

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The tests show that the lustrous surface which has high finish, good smoothness and better corrosion resistance can be obtained through the polishing process recommended by this paper.

试验表明，采用本文推荐的抛光工艺可得到光洁度高、平整性好、又具有较高耐蚀性的光泽表面。

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They used intense nanosecond pulses of laser light to turn the metal's lustrous surface a deep black.

BBC: Copper wire