He's referring to the sheet metal in the wheel wells under where what was once the grey plastic trim.
It doesn't look like he rolled the fender just looking at the lines where it meets the end cap. If it was rolled it wouldn't match up the lines with the end cap.
It looks like he just took off the grey trim over the wheel well.
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If we do not succeed, then we run the risk of failure. - Vice President James Danforth "Dan" Quayle