Originally Posted by mike5220

Sanding will likely remove the coating. Update, my gf's car had concrete all over the fenders & doors when she drove under a bridge they were cementing over. Amost in tears, she was as she tried to remove the stuff with shampoo & water. Shine&Shield did a good job of scraping the stuff & polishing the car. She was over the moon when she pick it up as it looked better than when the car was delivered by C&C.