How to make hot dog buns or sandwich rolls with a soft crust?
Normally, a bun for a hotdog or hamburger is going to be made of a softer, sweeter dough.  It will have higher egg, milk, fat, and sugar content.  It is a slightly softer (more water) dough than a white bread dough (and a lot softer than a crusty, lean loaf like french).  You will definitely want to bake it at a lower temperature, 425 is far too high.  I would not usually bake too many breads higher than 400.  A softer, sweeter dough such as this should be baked no higher than 375.  If you are looking for a good pointer towards the type of dough to use, I use the same dough for hotdog and hamburger buns as I use to make cinnamon buns/sweet rolls.