This is my grandmother's cleaver. I think she got it in 1952, when she got married and never sharpened it since.
Last few years when she used it, she just used it to cut up very soft things to mix. It is actually duller than anything else.
I have tried attackingwith 240 grit to no avail. Today I spent good 30 min with 140grit stone, made a nice slurry, and nothing!
Is there a chance to do this without actually getting a powertool involved?
Here is how it looks (I have no idea what steel it is either)
Thanks for advice