The blade is flat ground, if I had the proper wheels and belt sanders I'd be trying to craft a straight razor, all I have to work with is my air powered 90 degree die grinder with scotchbrite cookies, and my 2" air sander that I use for headlight restoration, I do have a 3/4hp bench polisher with a full compliment of jewelers polishing compounds and buffs.

I work on this exclusively on my lunch hour at the shop where I work as a mechanic.