can you tell me more about the protection film Mac 7 please
It's a self adhesive polyurethane film about 0.3mm thick which resists small stone chips. There are companies that make custom laser-cut kits for various car bumpers and bonnets. VW used small 'panels' of it on various models over the years to protect rear wheel arches (Mk2 Golf Rallye and B5.5 Passat come to mind) and in recent years offered dealer-fit front end protection kits.
I've been using it since the late 1980's on cars with wide wheels. The early stuff used to gradually yellow over a few years but they've improved it since then. Most recently I used some made by 3M, PU5025.
If you google 'paint protection film' you should get some useful contacts, or one of those companies that does car vinyl wrapping or sign writing should be able to help.