#1 you can NOT properly roll fenders with a baseball bat UNLESS you mean to just roll the inner fender so the wheel dosen't rub.

#2 I wouldnt roll s13 front fenders. Their cheap/thin as fuck and will crinkle.

#3 I have my rears HELLA rolled and it took me the better part of a few hrs to roll them and it was worth it. Although someone was nice enough to let me use theirs for free. Yes my paint chipped from the rolling and I have a few little creases (to be expected with the ammount of flair I have.. nothing that won't be covered soon anyway .. but all in all I like mine. There mean looking.