[urq] Rear fender rolling

[djdawson2 at aol.com]

I just got a "new to me" '83 UrQ.  I've not had an '83 before, and am looking for some pointers on the rear fenders.  I have installed a set of 15x8 Ronals on the car.  All is well, except for the most extreme travel of the suspension, where the rears will rub.
 
Looking for any BTDT on getting the clearance required.  After looking at the fender lip, it appears to be substantially more sturdy than the typical fender.  Where most cars have simply a single thickness of metal, the rear fenders on this car look to be almost like a couple of thicknesses rolled together, making me wonder if the typical fender tool (or baseball bat) would actually do the trick without damaging the shape of the whole fender.
 
Any advice or experience appreciated.
 
Thanks,
Dave
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