Try an aggressive clay. I used this for some hard water spots on my windshield on my DD and it took them right off with some elbow grease. Make sure you have a good lube to use with the clay.
__________________
2012 Magnetic Black 370z | Fast Intentions CBE | Stillen G3 | Motordyne ART | H&R Coilovers | Work Emotion | Fujimura | Uprev | Amuse| GT-R Start
|