PPF is tough stuff, but it won't last forever. Here are the details on why the film needs to be replaced, and how to get yours done.
Do I really need Paint Protection Film (PPF) aka Clear Bra? – Ask a Pro Blog
Should PPF look OK from 5 feet away?
PPF vs Ceramic Coating: Which Is Better for Car Paint Protection?
PPF & Vinyl; Same thing but (a lot) different.
How to Read the Spec Sheet
Are you familiar with the benefits of using paint protection film (PPF) on your vehicle? If yes, could you share some of those benefits? - Quora
Horrible experience with 3M PPF Completely deteriorated & hard to remove - Team-BHP
Should Paint Protection Film Be Removed
PPF Removal damage? Help. : r/CarWraps
How Much Does Paint Protection Film Cost? – vinylfrog