Maybe a very mild abrasive like scratch repair solutions careful applied would do it. Ive had a lot of success with detailing clay with a similar scenario, lots of lube/detailing spray needed.
I tried to remove some similar marks from a friend's silver Mondeo - thought claying would do the trick but it didn't. Then tried some Gtechniq P1 (by hand) but again failed. Finally tried some Bilt Hamber Auto Balm which removed them.