In real life, as you drive a car, or a truck, it's liable to get dirty. Some folks clean a vehicle themselves, others take it through a car wash.
With Withmore being as dirty as it is in some places, it makes sense to me that there would be the need for such places. Locations where you can get your car or bike cleaned, judgement in sectors for having a vehicle with any dust on it. There may even be potential for player run businesses which offer on the spot cleaning services without you having to take your car anywhere.
Beyond simple dirt and such, let's also consider the fact that other messes could get on vehicles. Blood can end up on clothes and such. If this is the case, then it stands to reason that spatter could make its way onto a vehicle.
I think this has a lot of potential. What are your thoughts?