This iron has just been "freshly" tempered! (i.e. Seasoned) Notice the shine on it!
This is the "before" picture of the same iron mentioned in the first picture before it was seasoned. Notice that it is dull in its finish.
I tempered or seasoned the iron by using Dudley wax. In a separate article, I detail how to temper an iron. However, in a nutshell, Heat iron up; dip iron into full wax jar making sure it is melting the wax and not the jar. Also, the wax jar should be tall enough to dip the iron in. Let the excess wax drip off and cool down. Then reheat the iron. Once the iron is cooled down again, then you are done.