Well when my friend and I were going to roll the fender, I forgot that the front had that one nut that sticks out (it prevents people from rotating their wheels and accidentally putting their rear wheels in the front? or something stupid like that). With that being said, the fender roller couldn't fit onto the hub. We ended up using a Eastwood Fender Finisher tool.
Eastwood Fender Finisher - Hand Fender Former Tool - Rolling Fenders - Fender Rolling Tool
He just clamped the fender flat basically instead of rolling it flat. We used a heat gun too to make sure the paint was soft enough to bend and such. From looking at it, you can't even tell my fenders are rolled as I did not bother doing a slight pull (I've done this with all my previous cars). The fender liner can be cut with an box cutter style exacto knife. It slices like butter. The fender tab, on the other hand, is a hefty guy. It took a few passes at it to cut it off. We relocated that mounting point to the position above it. Hopefully that helped?