Machete Knife How Can I Clean Old Rust And Thick Dirt Off Of A Knife With A Leather Handle?

How can I clean old rust and thick dirt off of a knife with a leather handle? - machete knife

I have a kind of machete-style knife with a curved leather grip. I have a knife at a flea market and it has rust stains on it and seems to be some rough pinch.

I tried a little solvent and gun oil, but in reality was not the case. What can I do to get the perfect thing?