But they could be what is starting atleast some of the rust cases. Surface contaminents can and will eat away and pit the paint. Once this happens, moisure gets in and mixes with our friendly contaminents. Where there was once paint and primer, there is now a moist contaminent to start the rust factory underneath. That's why it is important to remove these spots before they become a larger problem. A good wax job will go a long way in keeping things from sticking again, or atleast make them easier to remove. I know everyone wants to show off their dirt, but it's really best to keep your truck clean when you're not offroading.
BTW, nice post at XOC Schlud. A post about asking the pussies to clean their rear hatch is sure to get attention!
SOunds like some porn movie title! I wonder if any of them will listen this time?