You can also do well on a 6 x 48 belt sander. You can use 36 grit to clean off the scale and get it down pretty close, then switch to 100 grit. After that, it depends on how well finished you want it to be. If you do a good job of annealing after the forging, you can file it, but it takes a while. After heat treat, you can forget filing. It will be too hard.