It has done the trick on lot of my occasions. Old-fashioned vectordrawing on the enlarged file will get you the best file in the world, but it takes a lot of time. I did the Streamline trick on enlarged originals a lot and that can be an enhancement too. It is much better than the tool in Illustrator. Enlarging with the app S-Spline can get even better results by the way. Anyway, good luck with it!