Where I live I do not have access to great quality bakery breads. Is there a way to heat up an already baked french sandwich baguette in oven to get a crispy outer texture? Water mist on top before baking, egg wash etc?  
IMHO If the bread was never frozen, the moisture from the crumb has infiltrated the crust and left the crumb drier. So the best bet is to put it in a moist oven for 5 minutes. Just use a spray bottle to squirter the sides and back of a 350 degree oven as you put the loaf in. If it is already cut (partial loaf) I cover the end with foil.  If you froze the bread, I have good luck microwaving 20 or more seconds depending on the size then finish in a hot oven to crisp it up.  As my dad said..."I don't love bread, I revere it". I couldn't agree more.  