Thanks will do.but can't take the place of hand sanding ???
I am an admitted sluggard and an avowed machine finisher. I very infrequently hand finish the flats.
Properly done, they're different finishes.
I think the overly long sanding sessions are derived from the lack of belief that a good finish and crisp lines can be achieved on the grinder, when in fact, they can.
Surface finishing belts aren't magic. You can't fix a faceted grind and make it look good with non woven belts. It's the same effect as using a hand pad on a hand finished blade. It just evens the appearance of the "scratch pattern" if used correctly. They're bad about rounding over grind lines and generally making the blade look sloppily finished if you over use them.