You don't have to wory about rust if you slam your bus, the stones & chippings on the road will wear through the metal chassis & floor long before it rusts.
no lowered bus can follow me to half the places I've been. (looking for voulenters with spare bellypans to prove it FACT) (but yes, they do look better... Women have a hard time in life coping with all the nuisance and expense for slightly better appearance. Men do their part with cars. Still if I had to make a choice, I'd rather drive a lowered bus through "Speedbump-ville" than try to defy gravity in high heal shoes.