I've always sprayed grommets with WD-40 for install and removal. Never tried it but I could see see a heat gun or even hair dryer helping with old crusty grommets.

One last thought, brake fluid. I've had good luck revitalizing old rubber by giving it a long bath in brake fluid.

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