4/0 (0000) steel wool with a little light oil is good for the job, it will not scratch the non rusted steel. Sharpening is up to you, If you plan to use it sharper is good, if it's going to be a display knife maybe as is will suffice since you don't need bleeding fingers on others if you let others fondle it. How well you did depends on what you paid, condition is everything when evaluating collectibles. I like these too, have a dozen or so, several unused, they are certainly iconic knives.