Where, on the paint or what? If it's on the paint I would use Meguire's Stage 1 cleaner. That's supposed to remove any bonded contaminantes (sp?). Then just follow it up with the polish and wax and you should be all set.
Thanks KYREDP5 the stains are on the hood and front fender. I acuatlly considered Mcguire's. Another question, how often do I clean the filter to my Injen CAI? Well later.. I've got to start packing for my cruise to the Mexican Rivera, 7 days.