Originally Posted by Nightshade
Now if you had said something like the dirt that is on the truck is not cleaned off, and the wiping motion is only taking those particles of dirt and causing tiny scratches like real fine sandpaper...then I would have agreed
i did, i said the truck would have been dirty. but anyway, i see what you mean about rain vs. hose. the main factor i would say is the cloth he is touching his paint with and the water that has beaded and been in contact with his dirty vehicle. thats where swirl comes from. atleast thats where it came from on my last car before i knew any better.