Need help: cleaning bird poop on Llumar clear film

We had Llumar full hood, fenders, and bumper installed on my wife's M Coupe about 30 days ago. She does not drive the car in the rain.

Yesterday, sometime between 9 am and 2 pm, bird got to the hood. Outside temp was about 70 deg F but it was sunny. She removed the poop as soon as she saw it with microfiber and quick detailer, but it left orange stains. I washed the car at home last night, tried a few things, but I can't remove the stains.

Any advice? Is this typical for Llumar clear film?

My M coupe has Xpel on it... about 10 years of service, and I have never had a staining issue.