They may become unsafe to drive due to rust weakening parts of the car.
One reason would be exhaust fumes may enter the cabin area.
Depends on the climate they kept in.
harmful
The salt and the water will erode the metal
they are made with a paint and certin metals
Wreck
He was baby blue
cuz it will freeze cars
motorcycles
They get very rusty if you just leave it there without ever using it.
Identify
As far as I know, there were only 13 Rusty Wallace Signature Edition 97 Thunderbirds produced.