My dad had a "car coat" he wore it when when the family went on an outing once a month on a Sunday drive to prevent the vehicle from decomposing through disuse.
Heaters, if a car had one, in those days were so bad and the vehicles so drafty that a car coat was needed.
A few memories, chequered flag tape for side stripes.
Jack up bars and Thrush outsiders.
Fur interiors
Stick on rear screen heaters
Aftermarket windscreen washer kits
Clip on headrests with all the stability of the Cobra imitation seat covers
Paddy Hopkirk Mini accessories, seat tilt brackets, steering column lowering brackets, gear lever extension and switch extenders, - clever marketting, rake the seat with the brackets to look cool and you needed all the others to be able to drive the car
Mangoletsi manifold modifiers
Pleated cable operated radiator blinds.
Kenlowe fans.