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A mirror finish is something that depends only on the scale of observation.
A norton 8k gives you a "mirror finish", as probably would stones with grits like 6k, 5k. With a bad chromium, makes no...

Yes, but there is a difference in the size of the particle. You can find powder that is 320 mesh, 400 mesh, etc. from the chemical industry. What you should get is a good quality micronized chromium....

Hi there,

good to see people from Brazil here. Where did you get the chromium oxide?
Take care, since they are not all the same.

Best,
Felipe