I love the Menzerna line on MB paint. You say "lots of swirls" and without seeing it I would probably look at SIP for that. Good work time and finishes down, at times, just about LSP ready. Again, need pics to be a little more specific.
By all means, if you all you have is the 1Z stuff try it with the orange 4" pad and see where you are. It might be fine. If it's not cutting it crank that puppy all the way up to 6 and exert a bit more pressure and move slower using smaller work areas.