eliotandmax
It works! I was beginning to think that the folks on this site all needed therapy! I mean, who in their right mind would go out of their way to purposely dull a perfectly sharp bench chisel?

I have to thank you all.

What I did was to just grind a tiny bit off the end of an old ordinary file -- the part that had no teeth. I didn't bother to hone it; I just wanted to see if you were all crazy -- or if this was some kind of initiation.You know, for me to find the left-handed sky hook. So what I have is along the lines of the Bill Carter blunt chisel. And it works beautifully! The only problem for widening the mouth of my newly made wooden India rosewood hand plane, is that this tool tends to compress the fibers toward the sides of the mouth -- I mean towards the parts of the Krenov -style plane where the sides are glued on. But I can deal with this minor problem. Thanks again!