Use damascus ... grind to 220 the etch the crap out of it!
I'me just sayin'
In all seriousness if you are flat grinding the orbital sander will get you ahead of the game, but you are still gonna have to use a file or block to finish it out
I use a press or hammer . You just flip it around and make it do what YOU want!!! If you welds are good you can pretty much do what you want to it .. If not, well the scrap yard pays .15 a pound ........ errrrrrr,