I wash the whole car, then rinse the whole car. After using the free flow method I blow the majority of the water off the paint and out of the cracks with a leaf blower (such as you do). Once again, this is only for PH balanced soap, I have not tried it with something like Dawn. Then when MOST of the water is gone, I spray on ONR (diluted to QD strength with water out of my refrigerator-filtered). You would be surprised, when using a PH-balanced soap, how easily it washes off even when completely dry. I just did it today on my white cobalt SS. Windows spot a little, but paint comes almost completely clean after ONLY rinsing with hard water out of the hose. The few water spots on the window come off very easily with ONR. See pictures below of paint ONLY RINSED:
And of windows, you can see the minor spots at the top:
Sorry for the crappy iPhone pic quality. I focused on the reflection of the tree instead of the water spots, the little blurs up top.
I acquired this method, in part, from this video. Except, I don't use a quick detailer on the hard water, partially because I don't have a large waffle weave right now.. * Note for mods, I am not endorsing his products, and I don't use his products. I just want people to see the technique used in this video of washing the whole car before rinsing anything that I haven't seen on this site before:
YouTube - Adam's Polishes Video Vol. 6 - Chapter 05