I know this doesn`t align exactly with some of the information above, but RON@OPTIMUM posted the following information on their own forum recently.
Optimum Polish "cut scale":
Poli-Seal, Finish 2
GPS 3
Polish ll 4
Hyper Polish, Primer 5
Compound ll, Intensive Polish 8
Hyper Compound 10
Yes, Primer began life as Hyper Polish and was tweaked to support Coating bonding. I`d guess GPS will have about half the correction of Hyper Polish.
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