How to roll the rear quarter lip?

I've always used a bat to roll them. good enough for chip Foose, good enough for me.

Darts you can run into a problem though.. if you run the wheel well trim pieces. In those case I trim it with a grinder with a sanding flap disc, NOT A CUTTING WHEEL. Then I hand sand everything so there are no sharp edges.

The inner wheel house actually becomes the tight spot, not the quarter lip.

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