Hello well here is my problem...... A couple years ago my grandpa made me a hunting knife out of a old saw mill blade as my grandpa is over 70 years old he did a amazing job making it but i am finding it extremely hard to sharpen it ( to be expected ) as it is extremely hard metal but my main problem i cannot get the rust spots to go away the whole knife is hand made and was a gift from a loved one so i am trying as hard as i can to keep it in good condition. I've read that safflower oil can help keep rust away.. is that true? And how can i get rid of the scratches and rust spots out and polish the blade? I've already had to even the tang out by the hilt because it was way uneven and the actual edge of the blade didn't start till about a inch and a half from the knuckle guard the metal was so hard i destroyed a brand new bastard file when i fixed it. so if the metal is that hard how in the Hell can i make this knife shine and remove the ugly ass scratches that are on the blade without ruining it? like i said this knife is 1 of a kind and very sentimental to me as my grandpa has passed away since making me the knife...... PLEASE HELP ME I DON'T WANT THIS KNIFE DAMAGED ANY MORE THAN IT ALREADY IS