Rolling Duster Rear Fenders?

We used to use a old wood baseball bat to roll the lip in while rolling the car back and forth. Redneck way seems to work. We would tilt the bat up on the fat end in the space between the fender and the wheel and slowly roll the car and let the bat get pinched between them and slowly in increments roll the lip. Screws up the bat but that's the best use for an old useless one anyway.