There are of course many different angles to attack this but knowing the paint is going to be pretty hard something to consider is will you have any restrictions such as: owner's budget, time to get car finished, how many steps are you willing to do.
If you are comfortable with the rotary, it may need rotary and M105 is the paint is beat up. Of course then followed by a finer pad/polish combo.
Your best bet is to really to a test spot (or a few) until you find the combo that yields results you want. Once you have done that, its all a matter of repeating to the rest of the paint.