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It will work but the way it is made it is better working for lapping purposes.

For repairs, you can get, 400/600 Naniwa Chosera, I like 400 Sigma Power. For most cases 1k Naniwa Chosera works...

Atoma do not have 800 grit IFAIK, the 1.2k not good for repairs.
I use synthetics for any repairs, but if one does not want to invest in 400-600 grit synthetic the 325 DMT will work well enough.