I spent 12 hours this weekend detailing my cousin's '03 Trailblazer. When I finished on Sunday, I started to walk around the car for my final inspection. At that time, my cousin came out of the house to "help", holding a roll of paper towels. I tried explaining to her why paper towels shouldn't be used and tried replacing them with some detail spray and a MF towel. She refused saying she always uses paper towels. Guess that's why her vehicle was just one huge swirl mark.