You guys must have nothing better to do with your time. Far to long to spend cleaning a car which gets dirty by the following week or so.
for some its a full time job, I do not like swirl marks in my paint work, you can wash it and it will look clean, but then you can catch the sun at the right angle or a street light and it looks like it has been done with a brillo pad.
to be honest it only need's this type of clean once a year and if you use a good wax or sealant cleaning the car next time is easy as you can nearly just rinse the dirt off with just a hose pipe.
Dave