The paint protection isnít going to stop all scratches and chips but it does work and Iíd recommend it to anyone buying a new car. Iíll leave it to the experts to advise how to get your scratches done but if itís only a small area, I wouldnít worry about the small area left unprotected.
I had a major case of industrial contamination where some idiot used an angle grinder and the hot grit adhered to all the surfaces. Cutting a long story short, the repair estimate was over £6k but ended up being £240 when they found the grit ad adhered only to the protection. An acid wash followed by clay brought the car back to showroom new. Iíve had the car over three years now and never had the need to wax it and it still looks outstanding.
By the way, the most common source of scratches on the boot is apparently from belt buckles. The Brera having a high boot lip and rounded back is extremely prone to this but maybe less so on the 159.