Hi all, I've had my new car for nearly a month - love it to bits. Now though it is getting a little dirty. I've owned other cars from new and I found that after a little while I could see slight circles in the paint work. On my Alfa 156 (met red) I once accidently dropped a sponge on the floor then put it straight on the bonnet and scratch it. I was devastated. The car after that was a met black BMW. I didn't really love that car and washed it infrequently and didn't take too much notice of the paint work. Now I have this Iridium Silver C250 with Pan roof and I'm terrified of marking it. To the point where I park it in the furthest part of the car park so that I don't get door dings. Now I have to wash it and don't want to let anyone else make a mess of it. My normal routine would be to rinse the car with a hose before using a bucket with warm water and a bit of turtle wax in it. I would then rinse it off again with the hose and let the air dry it. On the black BMW I would see water marks. Is there a guide to cleaning a car so as to avoid the circle marks and other such OCD jarring issues?