This will take you straight into the 35th level without worrying about other Smithing methods for leveling. If you're looking to continue your questing, you could complete the Giant Dwarf quest which later will be required for various methods. There's RS gold some other quests such as Recipe for Disaster, Devious Minds, Cabin Fever, Elemental Workshop II, Family Crest, Fremennik Trials that you can finish to get the most experience. Remember that all of this quests are for members so people who are playing f2p cannot complete them. Unfortunately neither free to play quest rewards players who have Smithing levels.
LEVELS 29-40 IRON ITEMS. In this level bracket, you must make the best possible iron items from iron bar create - such as Iron Platebodies. The process of advancing to 40 levels should be completed in about an hour using approximately 1000 bars in input. The best spot to do it is at the western Varrock so begin crafting the pieces you need of Armour there.
LEVELS 39 99 GOLD BARS BLAST FRUNCACE. The most rewarding experience rates you will get is melting gold bars to levels 40 at Blast Furnace minigame where you can melt gold bars, which is the reason that so many people are doing this. Making cheap OSRS GP use of Goldsmithing Gauntlets during this training method is crucial since it significantly improves experience rates as well as gp per hour.