Years ago I was told by you ideally should put the Bra on when you think you'll need it, which usually means on long drives and rocky roads. Leaving it on all the time is not great for the paint or waxing and if you live in salt heavy cities there's a chance it coudl promote rusting.
If you follow that rule then you should remove it to ensure a consistent wash and wax on the car and put it back on when it dries.
Nah i just didn't want a black car and the only other I2 they had was white with a clear bra. So i was like alright i'll take it. I wish it had a thong but it only had the bra. Which mean the car is naked on the bottom half. THAT'S HOT!!!!
I would never leave a bra on the car except for long distance drives.
I used one on an old car I had years ago and only took it off during car washes. Amazing how much dirt/grime gets traped under there. Didn't take long before I noticed a line across the hood from where the paint was fading a little bit.