I can tell you that paper, such as plain old notebook paper, can polish metals. Working at a paper manufacturing plant I see many spots on the machines where the paper has polished the surface where it rides on the plates and some are mirror like. Granted, the machine surfaces are not hardened to a high RC but the paper is abrasive enough to cut into the metal. I have wondered about and seen where some have tried stropping with materials other than leather and pastes so the diamond sprays may be overkill. I don’t know.
