I'll kind of piggy back onto this one as well if I could. I picked up the new D/A microfiber correction kit and just hit the roof as a test this weekend. It works like a champ and removed these bad water stains that started to form now that I have moved and am on well water. This is my daily driver though so I wondered if I should be doing the second step with a diferent product to protect against the rain etc. I used #26 wax last time and while I liked the results it didn't hold up that long with the elements and frequent washing.