Just replaced the antenna mast on the NSX and it couldn't have been easier!
No, I didn't drive into a car wash with it up, but I rarely use the radio and on this occasion I back the car into the garage with it up. I have a lift so the clearance wasn't there! Replacing the mast was as easy as pulling out the old bent one and sliding the new one with the teeth of the plastic inner facing the back of the car with the radio on. Turn off the radio and it goes back down. Tighten your nut on the fender and you're done!
No, I didn't drive into a car wash with it up, but I rarely use the radio and on this occasion I back the car into the garage with it up. I have a lift so the clearance wasn't there! Replacing the mast was as easy as pulling out the old bent one and sliding the new one with the teeth of the plastic inner facing the back of the car with the radio on. Turn off the radio and it goes back down. Tighten your nut on the fender and you're done!