How do graphite blocks do mirror treatment?
Then polished diamond paste (grain size W5) polished, and finally use (W3.5) of diamond polishing paste polished to the mirror surface.
And then use a little more of the whetstone for grinding, to be polished rough sanding marks after grinding, and then change the 1000# size of the whetstone grinding.
Graphite blocks are usually polished with Whetstone, sandpaper, and polishing paste. The polishing method is to use coarse aggregate the entire surface polished smooth, remove thick marks, scratches.