Your bumper is fixable. Use a dremel with a pointed tip. You dont have to dig deep just get to fresh material. I did one worse than that here
https://forums.maxperformanceinc.com...d.php?t=856807 The nose center line was gone. Thankfully some members posted pics of what they should look like. It looks like you already sandblasted it. Thats a good start. The 3M is good stuff so you are all ready to fix it up. Good luck.