If me I’d try carnauba wax (Mother’s) on a small area over the NuFnish. I’ve used NuFnish long ago and don’t recall any issues. It’s silicon based?

A good cut/buff will do a world of good if the right person does it.
Good Luck
RonR


RonR


1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1964 CJ5