Sure. I use my NOAH BMW OEM outdoor cover in the condo garage when I travel.
Surprising amount of dust and crap settles on the car.
If it was a heated garage, not sure I would bother.
Character does count. For too long we have gotten by in a society that says the only thing right is to get by and the only thing wrong is to get caught. Character is doing what's right when nobody is looking... " --J. C. Watts