Has anyone ever sharpen a bulk paper cutter?

[Rhino]

I have a bulk paper cutter blade.  Little less than half inch thick, 14 inches long, 3.5 inches wide.  Single bevel.  It has a few nicks.  It can cut a 2 inch stack of paper.

My question is if anyone have sharpen one of this type of blade and if there is any advice out there.  Do you know if it will fit the planer jig?  Just wondering if you have any suggestions.

I guess one advantage I have over the people who uses the planers is that I don't need a straight edge.  It cuts into a cutting board slicing paper in between the blade and the board.  I think I can sharpen it freehand almost.  As long as the edge is relatively sharp and straight, I should be OK.

For those of you who want details, it is a Come Industries 2700 Bulk Cutter.

Thanks for all your suggestions in the past.