You can't beat a DMT 3, paired up with a starkie sharp (in case you don't know: a small piece of leather, charged with some kind of magical compound). Both my Bison Bushcrafter and my Northstar are hair-popping sharp (my left arm is bald, no girlfriend problem) and shiny shiny shiny.
Lovely.
For a convex grind, I find taking it length-ways in your fingers and, with a circular motion, rotating it up and down the blade. Difficult to explain...
With a scandi, much the same, except it's easier as there's no angle change.
Great piece of kit.