Thank for quick reply.
I had enabled all skills and the sharpen skill was in the correct place - but colored to show it was unavailable even after I bought it. With the screen set to only show skills I could use all I saw was identify under the craftsmanship tree.
I reset twice with the same result.
I do have 1.42 and in my last game sharpen worked perfectly - but I may have gotten it from the dungeon seller not the battleground seller that game. Also dungeon 2 was unpopulated which I had thought was an older bug that was fixed.
Maybe I'll save and reinstall the patch and see if that makes any difference.