Replying to How to remove goggle streaks on matte black helmet

Hey Newschoolers! My brother recently purchased the back giro ledge helmet at the start of last season. He is younger and just getting into skiing do he wore his goggles on on the outside of his helmet. The goggles he had were from the same company (giro), and had clear kind of synthetic rubber that made the goggles grip to the helmet. The problem that surfaced is that the black surface of his helmet not has lines that these goggles left from pulling up and down that I can’t seem to get off. Suggestions for removing would be appreciated!