...I have a zero edge on my SS4 and it is starting to get a secondary bevel and even has a couple little chips. It still cuts like a dream though. I left it a rough satin so when I do sharpen the whole bevel it does not take much to clean her up.
Usually only a quick hand sanding.
I will use a 15 micron finishing belt on the Bravo-1. It will begin to get a mirror like polish from the edge and fade to satin toward the top. It will still be convex, but over time a slight secondary bevel will develop unless I do it from the top all the way down. This method is very easy once you get a little practice, and it removes very little steel in the process.