Just seen this topic and read it all through. Couldn't believe the pictures, and that someone could be mindless enough to do that. f**king cocksucker wanker scum, and every other adjective you can think of isn't enough to describe them. It makes me so, so angry to see that.
I do really know how you feel after mine was keyed after I'd had it for about a month - all along the rear quarter and right down through the primer as well. It was parked on the road, and I'm certain it was a guy down my road who was angry that I took a parking space he wanted.
However, I do have some hope for you. I had it repaired by a company in Portsmouth who did a 'smart' repair on it, and the job was perfect. It's good as new, perfect colour match and you'd never know it had been keyed. Cost me £150, and there was another company who quoted £170 to do a full panel respray, and would have had it for two days (would have picked them but they didn't have courtesy cars).
It will be fine. Much as it hurts to pay the cash, your car will look good as new again, and that's the main thing. Is there anywhere safer you could park? A mate's garage you could use?
Honestly, the more time goes on, the more I think a locked garage is the only place to keep your car these days, unless you have a shitheap you don't care about.