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no, you are mildly bending the paint on the inside of the fender, you are in no way affecting the body lines from the outside of the car. If you need to do this, then you need different rims.
use a heat gun. keep it moving. paint won't crack. unless your paint is shitty like jesus' is. in that case, it will crack and flake all the fuck over the place.
i've rolled fenders with a socket wrench and the handle to my floor jack. just get yourself a heat gun, a bat, and get to work.