The garage wall panels are waterproof, and due to the smoother surface, you can keep the surface clean easily.
You will get FDA compliant wall panels from Duramax. The panels are ASTM certified as well.
You need to find a wall panel supplier like Duramax that offers a warranty on their product.
The PVC panels are light reflective, so there will be no issue with low light.
https://www.duramaxpvcpanels.com/applications/car-wash/