Identify that physical cover and ask quality to judge it against the appearance requirement. Retain the original images with their presentation details. The imaging comparison needs known samples, not a vote on which bright line looks most scratch-like.
Keep that nick location with the images, and wait for its disposition before calling the cover a reject reference. The moving lines may be a separate imaging problem.
Include the whole feature location in that review. Reducing the central glare would not help much if the actual unacceptable feature is outside the useful view.