Damage patch s coming, maybe dirt accumulation will be too.
I was thinking this too. Its the same with damage and dirt. You can see them during the race but not afterwards. Maybe the patch will also include having the dirt and damage stay on your car until you repair and wash them.
how long do you have to drive before you start to get dirt on your cars? Because I have not noticed any dirt even in replays.
It is kind of like the oil change I have yet to see the oil start to get dirty in the guage at the side of the oil change screen. In GT4 you could see the oil getting dirty. It never seams to change at all in GT5