Yep, was wondering about this earlier. Car needs a wash anyway so may try and do it this weekend.
PCP term is coming to an end but replacement delivery date is unconfirmed and likely a while away. Another thought I had was to just hand the car back with the damage and see what they say, I'm getting screwed either way so may offset by saving a few months of payments and other costs. Only concern with that would be interrupting my insurance and having to restart NCB.
I'd be tempted to wet sand and machine polish it, then go from there. That may well reduce the visible damage to a level where they won't screw you so much with the charges.