Most detailers would have a nervous breakdown reading some of these post on washing cars,, espically the car duster and rinsing the car off after driving in the rain and drying it. OUCH
But no problem washing in your driveway,, best to wash your car early morning or late afternoon when sun is going down,,, not good to wash middle of the day and allow the car shamppoo to dry on your car. If you use a good shampoo for the car then it helps a bunch. This is what I use.
Meguiars Hyper-Wash is a concetrated car wash for frequent or professional detailing. Super foaming, long lasting car shampoo from Meguiars.
Really great stuff,,, Or use a foam cannon if you have a pressure washer.
Just a thought, but driveway is great.