You're not reaming a half inch hole, your polishing a few thousandths of an inch.
You obviously completely miss the point, and it's probably better you leave your FCD in the drawer
Have "YOU" ever at any time tried to polish carbide?
I have and its not something one does with crocus cloth.
This may explain it a little to those that do not believe!
I'm not about to rush out and purchase the diamond compound to polish out 1 FCD die. Just not cost effective as the problem is solved to my satisfaction.
Did I miss the point, NO! I believe its the other way around.