Use a blow dryer, heat shit up to get the metal to work easier. Paint can only move so far. Go slow and use your hand for dent checking before they get nasty. One thing for sure, don't expect no GTP racecar flairs from the tool. It actually is just for bending that tire cutting lip flat against the inside of the fender.
Those 2 layer fenders usually need to be cut a bunch of times because the 2 pieces of metal want to move at different rates and you start to tweak the fender.

This is if you plan on making the fender flair beyond just a subtle amount.
fender.jpg