Carbras? no no no......they trap condensation and increase the chances of rusting where the paint is chipped, they can also move and scratch the paintwork if dust or grit gets under them. I spent some time working on secondment in France in the mid 80s when they first took off and my mate put one on his MK2 Golf........he took it off after about a month and the bonnet looked like it had been sandpapered!......They are ok if you are going on a long m-way trip but you have to make sure the car is spotless before you fit it and dont leave it on for more than a few days, particularly if the bonnet is already chipped.