You'll want the best cutting ability you can get in a polish for use with a PC. The best cutting ability medium polishes on market right now are
Menzerna Super
Intensive Polish,
Blackfire Scratch Resistant Compound, and finally Einszett Pasta Intensiv.
These are all medium cut polishes that work *very* well with a PC. Well, at least the first two do, as I have them and use them. Not sure about the Einszett, though, it's brand new and I haven't tried it.
Using a regular medium cut polish like Poorboys,
Menzerna Intensive Polish, or Optimum Polish just won't give you as much cutting (correcting) ability as one of the above listed polishes; you'll lose out on a lot of your PC's ability to correct swirls.
Keep that 106ff to use after one of the medium cut polishes. You'll have an awesome finish.
