what color? Swirl marks are small scratches. You might need to use a finishing compound w/ the proper pad. Cut and buffing is a time consuming process to do properly.
Plum Crazy Purple. They may be swirl marks, but they are vertical lines where I was doing it in sections. I started buffing with a wool pad and a cutting compound, then used a high quality finishing compound with a foam pad and spent a entire weekend doing it.