Grrr...Somebody left what I think was a cardboard box full of groceries on mine while they opened their car (my theory) and that really ticked me off.
That hadnt even gone thru the paint layer just some of the lacquer, and took me ages to get it cut n blended, carefully)
Even if you think its just gone to the primer,the centre of the groove might be right down to the metal
By all means cover it right now with something to keep air n moisture off.
If youve ever done any painting and depending where the scratch is you may be able to use the touch up paint .
Its water based paint and there is a certain amount of getting used to using it.
If its highly visible and a metallic paint, I wouldnt be able to do my own and would have to get a pro on to it.
and yes I have dreams of the parked car energised with 20000 volts that will taser stun attempted keying car toucher types ,or something equally nasty.