Hey mates, I have been facing a serious issue with gunmetal surface rusting. Somehow I manage to clean it and keep it back. Then again, the rust comes back and corrode my gun. I have read many blogs and question-answer sites. Nothing helped it out. Recently, I bought some steel wool to clean the gun. However, suggest me with some of the best gun oil also. If anyone can suggest me some solution, it would be a great help. I really appreciate any help you can provide.