Removing the swirls by hand with poorboys or menzerna by hand isn't impossible, but it will take you ages! Audi is very hard paint. Out o the 2, poorboys will do less than the menzerna as menzerna is specifically designed for harder paints. SSR1 is a finishing polish and won't touch swirls. Without a machine polisher, masking is your only option, unless you do a panel at a time, over the next 5 years! As said above, claying is essential! I tried polishing my old MX5 by hand, notouriously soft, and I gave up. Bought a DAS-6 dual action and went to it. An abrasive (Menzerna etc) polish will remove crap that claying has missed and give more shine, then a filling polish such as AG SRP will mask some swirls. By hand it's the best you are going to achieve in a realistic time scale. To break the abbrasive polish down, work until it is no longer white, but is like a clear thick liquid spread across the paintwork, by hand, this is an achievement in it's self. Sorry to be a pessimist. Hope you get the look you're looking for.
Neil