Turning my old grinder into a polisher?

I'm thinking of putting a good medium coarse wire wheel on one side, but don't know a thing about buffing wheels. I've looked around on the web for info, and see that there are basically three (coarse, medium and fine) compounds for different things, but I REALLY don't want to keep swapping out buffing wheels.

Anybody familiar with polishing?

Thanks!
Mel

The "art" of metal finishing goes something like this:

Example: mild steel
Coarse grit, medium coarse grit, fine coarse grit, medium grit, fine grit, very fine grit, extreamly fine grit, electroplate.

Each one of the steps takes the metal "grain" smoother than the last. If you were to magnifiy the surface you will see the grain of the metal "standing" up with high grain tops and low grain valley's. By finishing that surface we smooth that grain down to where the grain tops get closer to the grain valley with the above polishing compounds. The finest we can finish that surface grain structure is electroplating.

Electroplating is taking disloved metal particals and applying it to "fill" in the grain structure to almost a mirror finish. I say almost because if you magnifiy a electroplated surface you will still see grain highs and lows.

T_Bone