My new 2006 G6 was left under a pecan tree while I was on vacation for 2
weeks. Upon returning I quickly washed it off, but now have brown spots
all over the finish. What can be done to remove the brown spots?
I would try bug and tar remover first. Make sure to use a 100% cotton towel and make sure it's clean. You want to avoid grinding any dirt into the finish. If that does not remove it, I would try a clay bar. Most auto parts stores carry Mothers Clay bar, which should get your spots off. Again, be cautious with the clay bar... read the directions and knead/fold the clay often to prevent dirt trapped in the clay bar from becoming like sandpaper.