Well I think you were asking about what zone to brush up on your smithing.
The best zone intially IMO is Halas. There is a square in that town that all of the smithing supplies can be bought from three different merchants, one outside behind a building, a general merchant (for the water), and upstairs in one building you can buy the different molds and such you will need.
I got from 0 to 42 smithing in Halas. Its a good starting zone