Holescreek
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Maybe this site will help" http://www.engineersedge.com/surface_finish.htm
In metalwork the best we can do is to continue to even out the hills and valleys. I think Rake posted a photo in another thread of a surface roughness gage of the visual kind for reference.
Metal polishing begins where grinding and lapping leaves off. There is no filler, just a microscopic smearing of the surface metal. As I said earlier, an Ra4 finish is where you start seeing yourself in a mirror like finish.
Teeth are a whole nuther ballgame.
In metalwork the best we can do is to continue to even out the hills and valleys. I think Rake posted a photo in another thread of a surface roughness gage of the visual kind for reference.
Metal polishing begins where grinding and lapping leaves off. There is no filler, just a microscopic smearing of the surface metal. As I said earlier, an Ra4 finish is where you start seeing yourself in a mirror like finish.
Teeth are a whole nuther ballgame.