String manufacturers offer polished strings that reduce the finger noise and are great for recording. Sometimes strings that don't have polished versions are polished "by hand" by string distributors, charging a bonus. These strings play awesome, but tend to be on the expensive side of things. If you play a lot and change strings often, it starts to add up soon!
I wouldn't mind polishing the strings myself, but I have no idea of how or what tools I might need, or if it's feasible for a person that is completely inexperienced with that kind of tools.
So, is there a safe way to do it? Safe for the string, in the sense that it'll keep intonation or otherwise not deteriorate it too much. How do you polish guitar strings?