Yes, the Storm/Rotogrip box finish of "1500 Polished" isn't actually what you are thinking. You need the Storm Step Two compound to achieve it.
The nearest I have been able to get to this box finish is 360 grit all four sides(30 seconds), then 500 grit all four sides(15 seconds), then the Step Two compound all four sides for 30 seconds. The ball will not end up as shiny as the box finish, but that process gives me very close to the same ball reaction.