When I was at primary school I remember thinking it was odd that my dad had glued little plastic patches on the doors of the family's Vauxhall Cavalier.
I think the idea was that they'd stop flung-open car doors damaging the Cavalier's paintwork. I suppose it was the automotive equivalent of coating your sofa in plastic.
Looking back it's almost certain that the little plastic defenders were just as much about protecting the car from my less-than-careful style of opening doors.
Twenty-five odd years later and carmakers have finally caught on to the benefits of these little devices. And it is French car maker Citroen that is leading the plastic-fantastic charge with soft bubble pads on the flanks of its new C4 Cactus model.