I use one with sg320 but in my experience I wouldn't use it with sp120, it will just wear out real fast.This is 120 grit Shapton lapping disc.
I emailed Shapton and they confirmed that it is of the same grit as the SP120 I haven’t used it yet but it’s worth a go. I have some sharp drywall screen at 100 grit to try when I need to.I use one with sg320 but in my experience I wouldn't use it with sp120, it will just wear out real fast.
My wife got a hold of their Christmas catalogue. Gonna piggyback this thing onto her order . Next stop Home Depot. Wait a minute, looks like they have grit there too..I don't see why silicon powder should be considered so messy; just put a few sheets of newsprint under your plate, then toss it when you're done,,,, or, let the paper air-dry and collect the powder the next day. I ordered a small plate-glass from Lee Valley for under $20. Canadian ($16. U.S.) The plate measures only 8 1/2" x 14"x 1/4", so it's not difficult to handle, nor to store.
https://www.leevalley.com/en-ca/sho...lPKkwtaZxGZugrEdXcpPk5-gXV5YjdHhoCuoEQAvD_BwE
You can also buy "grit" at many auto-body supply stores,,, often sold with sand-blasting equipment.My wife got a hold of their Christmas catalogue. Gonna piggyback this thing onto her order . Next stop Home Depot. Wait a minute, looks like they have grit there too..
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