We just restored the backglass for a Williams Defender backglass. Below are the before and after pictures. Note the original backglass is mirrored. If we have your original backglass, we can wash off all the original (peeling) ink, and re-use the original glass with new ink (saving the mirroring.) If we don’t have your original glass, we can only substitute the mirroring with gray ink on a new tempered glass.