This is way off from shooting but wanted to know if you can help? I just bought a 2010 silverado and every time I get any type of mud on it, it stains the paint where the only way to get it off is to buff it. The stains look like water spots and washing it will not do anything. I have also tried using a clay bar, rubbing compound on a polishing pad and still nothing. The paint color is a taupe metallic grey(new color gm is using) and the dealership is giving me a hard time about fixing it. This is the third time this happens and I have no clue on what to do next............Thank you