How fine to finsih the treat?

[boxg]

Is there any consensus on how finely one should finish the treads on the wheels? In other words, what grit should one end up with. I've seen some say they treads really don't need finishing to others who say go all the way up to 8,000 to 12,000 and even a couple who say use one of the 1 micron polishes.

Thanks!