Having corrected several car doors in my 60 years of owning and driving, I have to say that using a hammer and something to pound on in order to move a hinge a fraction of a millimeter is common practice. Loosen the screws just a teensy bit, whack the hinge, check the door, rinse and repeat until it fits, tighten the screws. I have done this on cars from Mazdas to Mercedes. Not uncommon. I suppose they could use touch-up paint on the mark, or, so could you. Buy some, use it, and save it for other inevitable dings and marks down the road (literally).