New warrior skill would let you give the effect of sharpening to any weapon not just those with blades or points. Seems a bit unbalanced that those weapons can't get this effect to me. Would of course require different components, perhaps a file, rasp or hammer and might require you to be at a forge/anvil or blacksmith though that would make it difficult to do in the field unless you have a portable forge and anvil.
I really like this idea and I think it is something we need. Does not make sense that you can't get a bonus on a blunt weapon vs a sharp one. I think it should perhaps require a counter weight (equivalent of blade oil) and any one of the above mentioned tools (equivalent of whetstone).
Another idea with this might be to have it lean more on hitroll then damage and offer 2 hitroll and 3 damroll as the max bonus. I am also completely fine with giving it the same bonus as sharpen.
To me it just seems odd to penalize players for not using sharp weapons by not having an alternative to the sharpen skill.