doesn't have to be perk based.
then you can make overpowered daedric arrows since the beginning?? even worse!
It could be a level based deal, where you can make Iron arrows up to level 10 or so, then Steel to level 15, then orkish, then dwemer, and so on. That could work. Then with your perks for smithing builds you could make those arrows better once you reach the right level, even get to make arrows earlier in the game if you added the perk for that type of metal (or glass) before you reached the specific level requirement. Something like that I'm sure could work.