I've attached setting screenshots and an example of the bug. It happens on all cars in the game, no matter what body colour.
Anything not in the screenies is default.
Not a valid bug report. Also, 'AA' in ZeroGS is the same thing like the scaler in GSdx, meaning 2x means double the native resolution of the game,4x quad-triple the native resolution of the game and so on and so forth. Any bugs those might cause are pretty much expected since you are actually running the game in a way it was never intended.
Finally, this forum is for PCSX2 specific bugs, not plugin ones and ZeroGS has not been developed in years so it doesn't even have a thread to post problems like GSdx does.