Tom,
Know exactly how you feel - it must be 'Dent a Type S' day, today.
I was at the Scotland Meet in St. Andrews today, and came back to find this dent in the passenger door - except I don't think mine has been caused by a door, more likely an errant golf ball. However mine has pinged a bit of the paint off above the dent. I've sent an email form off to Dent Devils and will see what they say.
Good luck in getting yours fixed.