Without seeing your car, I would hate to say that UNO is going to correct your swirls 100%. Its more of a mid range cutting polish. Personally, I would purchase HD CUT to remove the swirls. Yes, it's a pretty stout compound, but if you use a lighter pad (say a orange, if not a white), you'll be able to back down the cut if needed. The marring left after (even on soft Porsche Clear) will only require HD Polish via blue foam to easily remove.
Make sure to constantly clean your pads after each pass. The dimples fill up with dried polish/paint and can cause a loss in cutting power as well as finishing potential.
Another thing you can consider......Not sure what wax/sealant you're going with, but if you're also using an HD sealant like POXY or Nitro Seal, you can replace HD Polish with HD Speed. This (IMHO) will create the absolute best possible finish you can create and will bond perfectly with one another.