It's hard to tell since I took the picture so far but this other Aozora owner that usually parks around me got bombarded with bird crap.
It's pretty bad. Even my car got hit a few times; it was as if a kid took a paintball gun and shot it all over the car.
He had it way worse though. Not sure if he is part of the forums or not lol but I feel bad for them since the roof was literally plastered.