Normal photo copy paper makes a very useful fine abrasive to fine polish wood. For a neck polish treatment, you can fold it down to a 1" strip and run it along the neck. It can be just as effective as 00000 steel wool, but takes a bit more time and leaves a smoother surface. It does remove finish, so you can sand down a thin finish to the bare wood before you know it, if you overdo it.
I learned how to use it from instructions on cleaning the airways of expensive whistles and recorders.
Recently I used paper to sand back some small scratches on a guitar and blend them out. It will make a matt surface shiny, with a similar shine to the wear from your strumming hand. It did a good job and leaves no sign of scratching.