I thinned and Convexed an Artifex 210mm today, so I got before and after pics to show people.
Before: Artifex out of the box with the factory edge. Notice the sharp shoulder between the blade grind and edge bevel:
After the blade met the belt sander! Notice how I blended the blade bevel right down to the edge itself and continued the convex of the blade:
From her, I sharpen up with various water stones, including J nats.
I tried this on a knife with the factory handle and it didn't work as well. The Rotary Platen I use to do this tends to bow a little and I need to get the heel to the middle of the belt to work well. I did it on my Artifex Suji and the heel remained thick for like 1cm and then tapered right down. This is something that works best with the handle scales off of the knife so they don't run into the belt when I have to bring the heel to the center of the belt. I am going to play with belt tension and see if I can get that issue fixed so I can offer this on knives with the factory handles on them.