Thats exactly what I was going to say. Factory Effex (they make motocross stuff) sells thick clear stickers in big sheets. You can cut out your own size/design. Super clear you can see rite through it.One buddy of mine who does sales presentations, used a sheet of thick clear plastic (possibly mylar) with some artistry adhesive to protect his rear cowl.
Unless you looked close, you'd never even know it was there.
Then, if damaged, you could remove and replace it with another sheet.