I used Klingspor W/D AO on my disk grinder years ago, on the advice of the supplier who was out of 3-M paper. He said this is just as good as 3-M at half the price. That should have warned me right there.
I put a sheet on the disk and went to town. When I put the knife on the disk, the paper turned glass smooth in a matter of seconds(80 grit), so I pushed harder and my magnet slipped off the workpiece hitting the spinning disk which then got my knuckles on the right hand.
Wouldn't cut steel very well, but was hell on tissue. It took my two middle knuckles down to the bone.
When I bent my fingers you could see the whole knuckle joint. I was alone and couldn't even afford the luxury of passing out. Just had to go scrub the grit from under the skin and in the knuckles, apply neosporin and wrap it.
I sent that crap back for a refund.:barf:
If you want to try some amazing stuff for hand rubbing, I'd suggest "Micro Mesh MX".
https://www.micro-surface.com/default.cfm?page_id=1
The MX is for steel as they make others for polishing plastics, etc.
It's expensive, so you probably wouldn't want to use it for a disk, but for hand rubbing it gives one of the best finishes you can imagine.
It outlasts regular W&D too, so you can use the same piece for a lot longer. I use WD40 as a lube while handrubbing.
They have a different grading system for their abrasives so look at the chart.
220 micro mesh is way finer than 220 P grade.
IIRC, I use 180, 220, 280, 300, and maybe 400 MX, but stop there as any higher is just too fine.
I use 3-M for most applications in the shop and have not found any other W&D paper to outlast, or even cut as good. It's a little more $$, but well worth it.
Not the best for finishing blades, but its perfect for ripping into long strips for handle work, and some of that stuff you just can't wear out.
