Rob sorry to hear of this mindless act. I think the days of older cars with multiple layers of paint that you could “T Cut” back into the scratch have gone. I have had very little success as most cars are lacquered so there is little paint to move.
I also tried a black polish repair pack. Well I certainly ended up tinted!
I would contact a local “ Chips away” / local spot repairer and see what they say.
In the meantime there is no harm in trying a bit of polish, as you can hardly make it worse.
Steve