Can mild steel be used as inlay in the steel used in guns and knives? I'm taking a class using keum bo technique on mild steel, which is more of an application for jewelry. I really like the results and am wondering if I can use the mild steel for inlay. Would there be rust issues or galvanic corrosion issues? I don't know much about steel, the different types and how different types of steel interact with other types of steel. Thank you for any help you can give me. - Diane B