Smithing is a production skill which turns ores and bars into a variety of metal amour and weapons. It uses ores from the mining skill at furnaces to turn them into bars, and then the bars are used on anvils to smith weapons or amour. Smithing is notably useful for making the requirements for summoning minotaur's and titans (bars and platebodies), for making bolts, dart tips and arrow tips for fletching and for piecing together certain high end items such as god sword blades.
Unique information to Arigon can include the following. A furnace and anvil is located at both the Skilling Zone and the Donator Zone. There is a hard limit of 1 coal used per bar whenever smelting. There are also Goldsmith gauntlets attainable from the voting shop to increase the experience gained by ~2.5x when smelting or superheating gold bars.
Smelting
Use the ore and then click on a furnace. Below are the levels required to create each bar.
Smithing
Use a bar and click onto an anvil. Below is a table showing the Smithing level required to create each sort of item. Note that arrow tips, bolts and dart tips can be created via Smithing and then later used with the Fletching skill. Everything created in Smithing is proportionate to the amount of bars used, creating an item requiring 5 bars will provide the same experience as creating 5 items that require 1 of the same type of bar but the later will take more time.