Not just a rotary thing; I do most of mine (when I bother

) with the Cyclo. Pressure/etc. depends on the product and all the other factors, but I often use basically zero applied pressure even on the Audis. IMO (and different people see this stuff differently) this step is doing work that's basically microscopic and I want it to be as gentle as possible while still accomplishing a little something.
So no, I don't think you'll see *much* of a difference, but by the time you start jeweling/burnishing it should alreadly look perfect. I can hardly ever see a difference that I can really verbalize, it's just that the overall vehicle looks "different" in a positive way, at least in the right lighting and when taken as a whole. Note that you gotta be careful to avoid "seeing what you want to see"