My suggestion to repair the shell certainly wouldn't consider a whole repaint. Only the most skilled could achieve a factory fresh finish, if that's your desire.
I, personally would remove the front stack, back up the damage on the inside with sheet plastic, fill the hole and melted section with modeling putty, & sand smooth. Re-glue the stack & feather in CSX grey paint. I have little doubt the paint will match perfectly & my answer would be some light weathering and call it a day.
Honestly, I'm not very critical but too each his own. Of course if the exact same shell was available at a reasonable price that is the easiest answer.
