I cover my car when its parked at work (FiST is my daily driver) I get to work, pull out the CA duster, lightly go over the car, and then shake the duster to remove any dust, and put it back in its holster. Then I cover the car with a Ford car cover made for the ST. I detail my car every 6 months and have noticed no swirls from the duster. Today is a 40% chance of rain, so no car cover.
This means I'll have to wash my car this weekend. I use a foam blaster on a power washer, the two bucket method, and a master blaster to remove the water, so paint swirling is highly reduced. People often comment on the shine on my car.
For detailing, I use a combination of Klasse(a german paint sealer/polish combo) with Pinnacle wax. Its called the original forum favorite kit from autogeek.net