I use the Mr. Clean AutoDry kit. Its GREAT! I also found out that the folks at P&G (owners of "Mr. Clean" brand) are planning to come out with a more powerful unit. Like Gripper, I use the de-ionized rinse as the last step. To me, it feels a lot like running a paint gun with fan pattern spray all over the Murano - only with de-ionized water, not paint!
As for the "touchless" wash, there are two kinds - the one that claims to be "touchless" but really uses mops instead of brushes. Mr. Wash in the DC area is that type. Dave's Car Wash on Four Mile Run in South Arlington is similar - except that also use brushes as well as mops! Both will hold dirt that will scratch your car. I have found, however, that the worst culprit for scratching is the guys that dry your car afterwards with the terry cloth hand towels. They just use them from car to car until they are too wet to dry anything and then get new ones. Problem is that the car wash doesn't really get all the dirt off so those "drying" towels pick up dirt and scratch the car.
The other type is truly touchless in that its like others describe - a garage-like structure where you drive in and park and then two huge wands come down and spray your car - no brushes or mops. As you drive out, you get the air blast dryer. Unfortunately for those of us close in to DC, those types of car washes are in the far out suburbs (nearest to me is in Reston).
Given that I caved and went to the Mr. Wash type places (the salt was THAT bad), anybody got tips for getting rid of the new swirl marks and minor scratches?