Buddha: I've been "layering" a coat a week of bare hand applied Zymol Concours for the past six weeks. Today I'm scheduled for the sixth.
Merci: yeah, I didn't bother recording the "wash" part since there's nothing too interesting about running a sheepskin mitt over the surface of the car

I think the rinse probably was a little harsh, but I guess I was trying to get all the soap off as quickly as possible. The spraygun part of the Gilmour foam gun generates a pretty stiff stream with my water pressure.
I prefer the "wide" setting on the fireman's nozzle to a no-attachment hose because I feel it gives me better control, less chance of scratching the paint if the nozzle contacts the car, better sheeting action in general and the ability to control the flow from the hoze end (with the Gilmour shutoff valve).
tegboy: thanks! if I had some way to reclaim and filter the water, I definitely would. I might look into some sort of "redirector" to at least flow the water onto the lawn at the bottom of the driveway.
sean: we've got relatively hard water, actually. it's pretty clean but definitely up there on the hardness scale. I've never had water bead like it does with this Zymol - it's really amazing.