Diamondbrite can offer increased resistance to dirt and other unwanted elements which can help retain the shine of your new car. However, these kinds of coatings often require specific cleaning products to be used in order to maintain the protection, and even then their effectiveness is reduced over time. You also have to remember that the dealer is making a significant mark up on it.

Ultimately it depends on how much you are prepared to pay to keep the paintwork looking its best. We'd suggest finding a local vehicle detailing and valeting firm - most are mobile so will come to you - who will be able to offer paint protection for less and will do a far better job. It's a worthwhile investment if you plan on keeping your car and want it to look its best.