I used the 2 part bumper urethane and fiberglass cloth to repair 2" hole and two tears in a Neon bumper (daughter's car). It came out fine for a DD. It has held up fine also.

After I was done, I looked up cost of a replacement cover at WW Sherman. It was $70 or something like that. Counting the hours spent repairing, smoothing and priming, I would have been ahead to get the new cover. Worth checking what a repop costs for your model.