Hammer-trons gain item experience at a rate of 7.8% of the base experience of normal Smithing actions performed while wielding it - this includes smelting bars, smithing bars, and actions in the Artisans Workshop. Protean bars give half the tool experience to hammer-trons compared to skilling with regular materials. This means that it takes approximately 514,000 Smithing experience using regular materials to raise the hammer-tron to level 10.