I am on a well at my house, and the outside faucets are not on the softener system. I learned the hard way on my last car that the water leaves terrible mineral deposits when it evaporates.
I take my SKY to local do-it-youself wash, and bring my own bucket, soap, and washing mitt. I only use the water, and NEVER use the brush, or even the soap from the wash system.
Then I dry and detail it right there. The only problem is with the grille, which holds lots of water, so I drive home via the freeway for a few miles to get the water out of there.
The results are worth it.

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V8 SKY
Formerly GByrnes
SE Michigan
Mallett V8 SKY #004
Order: 1-21-06
Delivery: 5-24-06
Sent to Mallett: 1-3-07
Mallett Delivered: 2-16-07
Mid Blue, Blk Leather,LSD
And I Collect PINBALL MACHINES
http://www.flickr.com/photos/clarkston_pins/sets/