Steel Steel fruit

==Description==
The user gains the ability to turn parts of their body into steel, taking on the strengths and weaknesses of the aforementioned metal. They are, however, unable to move the exact part at the starting levels. For example, if the user turned their hands to steel with an open palm, they would be able to slap their opponents but not punch them, being unable to ball their hands into a fist. Likewise, if they balled their hand into a fist first and turned their hand into steel, they would then be able to punch and move their arm freely, due to being able to move the muscles and such in the rest of the arm. As the user masters the fruit, however, and as their strength increases, they can eventually manage to move their body whilst in this form, although it isn't possible to change more then 20% of their body at a time into steel. Ever. So it cannot really qualify as a logia, due to the user not being able to transform completely into steel. The user also gains the weakness that they can rust if their parts are hit by large amounts of water, requiring medical attention once they manage to change the rusted bodypart back to normal. (by Cylan) [1] 
==Trivia==