Found this on MSN just now, makes a good read but fairly common sense.
http://www.msn.com/en-gb/cars/ownership/wash-your-car-like-a-pro/ss-BBv3eh4?li=BBoPWjQ#image=1
Tony.
http://www.msn.com/en-gb/cars/ownership/wash-your-car-like-a-pro/ss-BBv3eh4?li=BBoPWjQ#image=1
Tony.