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:rolleyes:

Ok, that makes more sense. Thanks for clearing that up.

Am I to assume then that most people use the "P" grits when just conversing on here, despite CAMI being the supposed standard in the US?

So in the list DPflaumer just gave me, those would be CAMI numbers?

Aha, according to Sandpaper - Wikipedia, the free encyclopedia the "P" refers to the ISO/FEPA system, the other one being CAMI. In higher grits, the CAMI numbers are smaller, thus the "P" would be...

I have some sandpaper that my brother in law gave me (he's a mechanical engineer specializing in materials), and I told him that I'm getting into straight razor restorations. Since a lot of this is...