It's a big initial investment, but I'm thinking about switching to rinseless car wash (from Griots garage). It's supposed to be the best of both worlds between waterless and traditional bucket and hose.here we have hard water that will leave spots on anything, i now use Distilled water on the hot rod and my dark blue truck. i dont even have to dry them off because they will not leave mineral spots. and for soap i get splash windshield washer fluid from target, its spotless also, mix the 2 together in a bucket and scrub then i use a sprayer with the distilled water to rinse it off. especially good for sensitive glass. gallon jugs or distilled water from the grocery store, 1.98 each usually takes 5 to do the truck but well worth it..
Rinseless Wash