I know how you feel pal. I bought my Git new in Aug 10 and parked her at work, in a secure-ish city centre car park (Sheffield) and once found a 2 foot keyed scratch in Jan 11.........it hurt so much !!
Have only just sorted this out and only cost me £80 for a repair & spray of the affected rear door................but as everyone else has suggested; don't be too paranoid about it !! All you can do is try and park her in suitable spaces etc, but other than that...............what will happen, will happen pal !!
Since my GiT's birth in Aug 10, I've always tried to keep her clean but then the above happened. But I always parked well avoiding scratches/kerbing to my 18" Monza's too..............then I made a error, I let my wife drive and park...now I have both front and rear n/s alloys kerbed !!!
My bad for drinking on those nights !!!
She's never kerbed or even damaged any part of her new Polo though...................I don't think she loves me anymore !!
Red