You're talking the steel right? I've taken 400 grit emory paper and placed a "drag" finish on a blade. Folded the paper over a popsicle like piece and dragged it from handle to tip OR place the sheet on a flat surface with a sharp edge. Using caution to maintain even pressure and always make full length passes. Free grit will occur so you must keep the back surface clean or tape the back side to prevent swirls. It didn't take all that long and came out acceptably well. It will reduce the value of your knives but the glare will for sure be reduced. This is clearly a Bubba approach.
I would bead blast it if those were mine.
The metal will oxidize with time and make the scratches less noticeable. You may want to start with 600 grit
