Smithing is easily one of the toughest skills to level up. This guide will show you the fastest, most effective way to get 99 without wasting any time. It's intended for F2Pers but P2Pers can get something out of it too, I think.
What you need:
-4-8 accounts (now referred to as mules), and your main account you wanna raise smithing on
-SCAR, iBot, or any other working macroing program
What you do:
-Get your mules through tutorial island then auto their combat level to around 50 (explained later).
-Take them to Southeast or Southwest Varrock and powermine on them till you get 15 mining. Keep all the items that you gained from doing this.
-Find/beg for/make a script that mines and banks all iron ores from Southeast or Southwest Varrock. Run it until all of your accounts have 60 mining.
Now I will explain the plan: because smithing requires a ton of ores, it's pointless to mine all the ores yourself on your main because that's a huge waste of time. What we will do is make half of your mules go to the mining guild (hence the 50 combat...avoids instant bannage), and keep the other two mining iron at Southeast or Southwest Varrock. All your main will simply do is simply take the ores (I do this in intervals of 5k or 10k ores) from the mules, smelt them, then smith the ores.
What next?
-First, do any quests that give smithing XP on your main. I'm a F2P, so the only one I know is The Knight's Sword - it takes you from level 1 to level 33 smithing
-HERE'S THE MOST IMPORTANT THING - Once you get to 50 smithing, you'll have the urge to make mithril items. DON'T! Making steel plates is easily the best XP gainer (for F2P) out there:
Now all you have to do is keep your mules mining constantly (3-5 hours a day, excluding weekends), then transferring the loot to your main via virtual machines (Search button pl0x), then smelting and smithing them into items.The only good way to level up for a non-member is by smithing Steel Platebodies. Some people may be wondering why this is the best method for training, here is the explanation. Let say that you have 1000 Coals (since you need Coal for all the items above Steel), with 1000 Coals, while making Steel Platebodies, you receive (1000/ 2) * 55 = 27500 experience points. If you are making Mithril Platebodies, you will only receive (1000/4) * 80 = 20000 experience points. Same thing goes for Adamant and for Rune.
Enjoy, and good luck on your quest to 99 smithing, if you choose to accept the challenge!
Here's a very good Smithing guide: http://runescape.salmoneus.net/smithing_help.html