Thanks Dennis, yes you are correct cleaning and waxing our cars is better, but my main reason for saying water is hard is ,everytime a car is washed it is wiped down with either a cotton towl or something, or synthetic chamois, this is what i use. And the critical thing here is what you use for drying of your car,all the rubbing onto your paint, how you use it and if you do it 20 to50 times a year,and remember everytime it is washed water gets down into the crevases of the body ,under chrome strips and sit s there and can speed up corrosion. I use a quility synthetic chomois, they are made in holland and are very soft, never leave streaks, are keeped in a plastic container damp so can be used anytime. I posted this dutch chamois in a previos thread in care and detailing but i can not find it regards wayne.