Does SanFran have any self-wash bays? I would never never never never never never use their brushes, and probably not even their soap, but it would be a place to get water and a hose.
The ONR and other rinse-free options are good too.
Was: 2008 335xi sedan 6MT Black Sapphire Metallic
Is: 2013 Fiat 500 Abarth Nero (Black Metallic)
On Order: 2014 Tesla P85D (Blue Metallic)
Wife's: 2013 Infiniti G37 S sedan 6MT, Black