This. You might get away with it for a respray but alternatively they will notice and then charge you the same amount as they would have already plus you will be out of pocket for the respray.Probably best just to inform the hire company if its that bad. Things could get a whole lot worse if you got it sprayed behind their back and they notice the repair work.
Halfords can't do anything. It needs a re-spray. I was quoted £250.
What if I was to phone the rental company to try and get my rental extended a few days as the re-spray will take 2-3 days?
Will I get away with this, seeing as its not my car?
call them up from another number, and say "I've scratched the *focus that I lent from you, where do we go from here"
Just take it back. If they check the car out and notice it,
then start repeating everything he/she says in a childish voice until they 'let it go' out of frustration.