what he's saying is that if you try to modify the back to cut out the tail pipe pieces in urethane, you can do it, but the filler will seep and you'll see it like a week later. so fiberglass it is for the rear.
now his reason for the fiberglass was the paint will adhere to it better than urethane and it takes a lot more finagling with urethane. he said yes urethane is more durable but its more likely that you'll have issues with it cracking if you bump anything. "sure the bumper is more flexible but the paint doesn't flex with it" as he said.
now his reason for the fiberglass was the paint will adhere to it better than urethane and it takes a lot more finagling with urethane. he said yes urethane is more durable but its more likely that you'll have issues with it cracking if you bump anything. "sure the bumper is more flexible but the paint doesn't flex with it" as he said.
