|
salt
Donee,my guess is that air escaping from the engine bay,out through the front wheel-wells is picking up water from salted roads ejected from the tires.In a rain you may have noticed spray blasting out of this area on other cars.Anyway,the water evaporates as you drive,leaving the salt residue in this area of spray,held close to the car by the surrounding undisturbed air.---------------------------------------------------- A car like basjoos Aero Civic wouldn't have this,as the front wheels are faired in.
|