Never anything serious, broke one of those little key fob things(hehe, sorry can't remember the name, it's the thing that has the lock/unlock/alarm buttons on it) because I was just careless and tossed it to my father. Took about 2 mins to put back together, worked fine after.
Not really damage, but as I was QDing a car to remove polish dust, I realized I picked up the Megs
Hyper Dressing bottle, and noticed just after I coated half the roof in the stuff. Didn't take too much effort to remove though.