Do security applications that “clear tracks” or “wipe free space” really work? Which one is the best ? Any free ones anyone can recomend?

I’ve used a cheap grinder with felt buffing wheels. I’ve used a white “cutting compound” and a blue polishing compound. I can get the big problem scratches down to scratches put in by the buffer. I can get those scratches to tiny scratches. I just can’t get it completely shiny with no marks. I know that record stores use similar equipment (not the cd cleaning machines, a buffer with some mysterious compound) and they always have completely shiny CDs that have no tiny scratches left.

I’ve also tried Scratch and Swirl remover.