just epoxy it. will take you 20 minutes and 20 dollars. if you want to try and color match they make pigment like https://www.amazon.com/MEYSPRING-Royal-Epoxy-Resin-Pigment/dp/B07QD8CS83 you can mix in. it won't be perfect but you won't be able to notice without getting close up and it will probably be behind the license plate anyway