Have about the same size peel just below the curbside front clearance light.
Still haven't determined what started it, no surface damage, may have been contamination when the panel was coated.
Just smoothed edges, cleaned with mineral spirits and used Rust-o-leum brush clear, has kept it from spreading just over a year now.
I just got some KBS Diamond Clear
to try, should work better than the Rust-o. Will test it on the filiform also.
"Sticks & stones can break your bones...and hail will dent your Airstream"
So when is this..."old enough to know better" supposed to kick in?