I've gotten some high carbon steel blades to a mirror sheen from 400 grit. I imagine a gun will be easier to do because I don't risk cutting my finger off and it's a lot smaller. Not to mention you have to work to keep the edge nice and even.
I think I'm gonna go for it, but I can't start for a while. I will post a full thread of the process from start to finish and probably some videos.
"All that is necessary for evil to triumph in this world is for good men to do nothing."