FYI 220 grit US/CAMI equals approximately P220 grit FEPA.
P500 grit FEPA equals approximately 360 grit US/CAMI.
So currently the base starting grit for many Brunswick ball to whoch ROugh Buff is applied is finer than the base 220 grit US/CAMI that was applied to such balls as the Brunswick Vapor Zone and the MoRich Shock and Awe.
Whether or not anyone here remembers, I do remember that the 220 Grit US/CAMI PLUS the Rough Buff application was determined here by people OTHER than myself to be equivalent to roughly P4000 grit FEPA. So if P220 grit FEPA (= 220 grit US/CAMI) + Rough Buff ~ P4000 grit FEPA, THEN, P500 grit FEPA (=360 grit US/CAMI) + Rough Buff must be greater than P4000 grit FEPA, probably at least P5000 grit FEPA. (Given what I have seen and experimented with the Trizact white pad [cerium oxide abrasive], I'd suggest that the final grit layer was closer to the P6000 - P8000 grit FEPA that is produced by the White Trizact pad.)
This must be true UNLESS Brunswick has changed the amount of Rough Buff use, or the amount or pressure applied to the Rough Buff OR the amount of time for which the Rough Buff was applied.
"None are so blind as those who will not see."
"A comedian says funny things. A comic says things funny."