My new to me 2011 Gt radio display appeared to be a scrached mess. I removed the radio trim and there was a cratched up grey piece of flexible plastic ( about as thick as a zip lock bag) covering the plastic display. It easily peeled off. I assume it was there to prevent the plastic display from scratching. Is it OEM or did the previous owner install it to keep the display from scratching? Could i glue glass to the front of the display?