I'm a little concerned about the spots I'm seeing in the paint. It's a black truck and I bought Zaino's today. I used Dawn soap, as told by Sal, and washed the truck today in a partly cloudy/sunny day. I went over the entire truck with Dawn and after drying it off, I now have these spots that didn't appear to be their before. I've been told it could be acid rain that ate through the clear coat or it could be from the hard water and minerals that built up. I've also been told it could be from the sun baking the water/soap and having it eat through. Not sure what I can do. Any ideas?