Follow up to this story:

I got the bill from Zipcar for the dent repair. about $800! @$#@$%!
Insurance has a $500 deductable, but still that seems like a lot for a
dent. Maybe that is just because I am not used to paying for car
repairs. Anyway, it would have been marginally worth it without the
dent, not including my time and the risk factor. With the $500 dent
thrown it, there is no question on the matter. Not to mention the
awkward conversation with my wife on why my $100 milling machine ended
up costing $800 extra. Drat!

-holly