I have stored my car all winter and have started taking it to work now that the snow banks are melting. I always park as far out as I can but this is a VA hospital so by the end of most days, all the lots are full, Anyway, I came out of work the other day and a HUGE ding/scrape/dent was in my passenger door!! No one was around and all the spaces next to me were empty so there were no witnesses. It looks like I am out of $1000 to get my door fixed.

How can I protect my car in these lots?