Hi all, thanks for all your responses. Sorry for the delay in my response, I never got a notification that anyone had responded.
@Magnet thank you for your advice, very useful and this was my plan until things had got worse (see below for the update).
@Turlough thank you for your suggestion, I will try and find some of this stuff (again see update below).
Update -
So looks like the car will be going back to the dealership after all, I didnt want to do a 400 mile round trip for just those marks but unfortuantley another problem has popped up. The LED lighting in the S Line sill trim has stopped working, which actually really affects the look of the car at night since the rest of it is lighting up beautifully. So I thought might aswell hit two birds with one stone and get the dealer to get these marks out & fix the lighting issue which they have agreed to.
....however need your advice as clearly you guys know your stuff. If the dealer says they cannot remove these marks (they caused this damage as its not in the pictures & video they sent me of the car) - what should I do? Should I ask them to replace the silver damage trims? Ask for cash? Any advice would be appreciated.
For context, its a big dealership up north with over 3000 cars over three different sites and they turn over millions a year (cant say the name just incase they find this post before the repairs are done 😂)