Someone keyed my car....

I can add my scratch here then, although mine was (and still is) full of road grime. Rear N/S door, pretty much full length from handle to gap between doors. I think mine was a neighbour's kid's scooter handlebar, about a month ago. Again looks down to the metal in places.

I'm wondering where you guys get your touch-up sticks from, as I might have a go at touching it up and polishing out before I spend yet more money on it. Do you get it from Audi (take paint code in) or do you get it matched at a paint shop?