[brian blade]

Well I have been working on this knife for a while for a good friend. I made the blade out of a old black diamond file and I must say it came out amazing. Just finished the handle last night.
my question is about putting a hand sharp edge on it. when I made the blade I hade a pic in my mind of my Grandad sharpening his knifes on a leather strap and think I need to do that with this knife. the edge is strate as a lazer. no power tools were used in making this blade.
the handle is large to fit my friends freakishly large hands.
anyone have any info sharpening on a strap>