Thanks guys.
Yeah BJ, they were all volunteering to go get some kindling.
Clint, I started off by cleaning off all the rust and loose debris using a wire cup wheel on an electric angle grinder. Then I cleaned up the mushroomed edges and rid them of any pitting using a pneumatic angle grinder. Then I took them to the belt sander to get even grind marks. After that, I just sanded then by hand using finer and finer emery cloth until I was using a scotch bright pad.