Talk about a “barn find!”
Some people have complained of the PPF on their vehicles turning yellowish after 8-10 years. Personally, I believe that was happening on the earliest examples of PPF and was complicated by the owners thinking it was an “install and forget” item as well as the vehicle being parked outside and exposed to the sun and other elements.
I’ve had PPF on my last seven vehicles and I’ve never had a yellowing issue or any other problem. I’ve never had nor seen an issue with PPF fading the paint. And some of my rides had the PPF on the entire front end for 12+ years and counting.
However, my rides are garaged and I detail mine, too.
Is the PPF on your daughter’s 350 on the hood only or the entire front end (painted surfaces, headlights)?
On a side note, was there a maintenance file associated with the SUV, i.e., receipts for fluid changes, etc.?