Hi,
What kind of sharp? Razor sharp? Good sharp? All knives do not need the same edge.
I mean, a model 23 is razor sharp as soon as u get it but u don't need such an edge on a 18.
Is it stainless or O1?
About "throwing" a Buxton fighter, I will think twice (to be honest I will always think twice about throwing any randall, model 9 exepted).
A good edge that last long is better than a razor sharp that will u loos quick. On stainless, I prefer diamond sharpeners.
Have u thought about ending the sharping with a leather belt? Personnaly, I will say that the most difficult to do is to keep the same angle on all the edge and on both sides.
What kind of stone/sharpener do u use?