Hi, It's called burnishing. I wish I could Type with more than 2x fingers. jewellers use stitched, 3-6inch cloth or leather disc spinning @ about 2250 RPM. Mop is dressed with,..tripoli (aluminium oxide & grease ) then red rouge, then green rouge (chrome oxide) When lightly dressed & spinning...this strips off top layer of metal, to even out high points (make lower) as polish compounds get finer on different wheels, the surface of metal is melted , to floww into valleys. this results in a smooooth shiny finish.. person attemping this is considered SUICIDAL. -warning-if untrained ,do NOT try this @ home !!!!I only explain to understand theory. This is what stropping (burnishing ) metal Great jewellers of old rub metal with a smooth
gem -stone ,rubbing Furiously. To Cut to the heart of the matter,...Bevel of blade is laid on leather, to the Spine direction. this is effecting the burnish. other direction will slice into Leather. I hope somebody understands my ramble. cheers W