Now this is a new one to me. I've used a claybar with good success on windows, but never thought to try steel wool.
https://www.youtube.com/watch?v=D05vX-G9iV4
https://www.youtube.com/watch?v=D05vX-G9iV4
Never attempted to use steel wool on my car. I only use it to remove tough debris that can't be removed when washing dishes/cooking pots. Lol.