A crazy idea - "Hot honing"!
Since metals expand as they heat, I was toying with the idea of heating the blade before honing it, with the expectation that when it cools, the new edge will contract and therefore become sharper.
Although I can get a good edge on a blade, I don't think I can get consistent enough a result to make this a fair test so I wondered if any honemeisters on here wanted to give this a go?
I was thinking the blade could just be slightly heated (say under a hot tap) so that it can still be handled without gloves, but feel free to try a wider range of temperatures if you're feeling brave!