How to roll the rear quarter lip?

I want to fit max width rear tires under my '72 Swinger. With the right backspacing, 325/50R15 should be doable with the spring relocation and minitubs. It's had the rear quarters replaced in the past, and I have learned that the replacement quarters have a wider fender lip than OE. Pic is a 295/50 with too much backspacing on the 15x10 rims. VERY close on the frame rail.

What is the best way to roll the lip (hopefully without taking all the paint off)? I've heard of using a baseball bat... any other techniques?

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This looks like a possibility and isn't expensive (although more than a bat) :)
https://www.amazon.com/dp/B00H8XU03O/?tag=joeychgo-20

WOW $45 that's a deal, there is no way you could make one for that price.