I had a set of irons lapped a few years ago went on to other project now im ready to use and im seeing this. They were in my hall closet and were oiled before storage. Not quite sure what to do now. You cannot catch anything with fingernail and are very smooth.

 

Could be the oil was absorbed into the iron. Whether it will hurt anything I have no idea.

 

Guess ill roll with them and see what happens. Unless any other opinions are out there.

 

Roll with em.

 

its just stained, it'll come out after running