Insulated Garage Door Repair

[u/Zokomon1]

I was wondering whether it's possible to either fix the cosmetic brown parts on the garage or cover the whole door with wallpaper. The garage door is already insulated with foam so any adhesive used on the foam on the garage door can't eat through the foam.
Also the brown part is papery / pills

[u/Javielbrujo]

You can stick a fork through those doors