There's one by Terry Primos that's edge quenched. You can definitly get a sharp hamon, it just takes a steady hand when quenching.
The secret to a good etch is a very clean blade. I never buff a blade - it's nearly impossible to get all the compound and wax off the blade. I hand rub mine to 600 grit with some oil, clean the blade with acetone, then rubbing alcohol, then etch in 1:4 ferric chloride:water for about 20 seconds. The hard edge will be black, the spine will be grey at this point. After that I just polish with some flitz using my fingers. The hard steel polishes much quicker than the soft steel, so you'll soon have a satin polish edge and a grey spine.
If you can't get the acid white vinegar works too, it just takes longer and the contrast isn't as great.