I think that there is a point of return here for blotting or wiping....I prefer to wipe the car dry...is this creating a few swirls...most likely....however most all of us, are here daily talking about how to protect our car. We are the same group of people that spend countless hours keeping the finish on our cars in pristine condition...My feeling are for what little swirls I see caused using a high grade MF towel, drying my cars....the amount of surface protection I have on the car is about the only thing that is damaged....I work my cars over weekly with QD spray, S&W, wax, polish, etc....so the amount of induced swirls at the wash stage making sure its done right, is of no consequence to me