17. After the fender is cut, I used pliers and a hammer to massage the metal up and out of the way. The rear was mostly just a bunch of hammering to get the metal folded under and flush against the wheelwell.
In the front, pliers were used to bend a lip all the way along the cut line to give the fender a little more structural integrity after it was cut.
I suggest using some flat black spray paint to cover any spots where you might have cracked the paint and exposed bare metal while trimming the fenders. None of it will show because it will be covered by the cut-out flares.