When I bought the truck in my avatar, there were two somewhat shiny spots on one front fender. The owner would repaint the truck every few years in the winter (for something to do)and had just painted it the winter before selling it. First car show, some kid slid down the front fender scratching it. The owner got yelled at by the mom for saying something to the kid about it. The shiny spots were his attempt to spot spray the scratches. Tough to due with flat black. I've seen kids start to walk up the fender to get a better view through the window.