When I fitted the upper breast hook I rounded over the bottom edge but left the top edge until I decided how to finish the top edges of the sheerclamp in the forward deck area.
I seem to have reached a decision that I am going to leave them as they are, because they look just fine unrounded.
So while the router was busy doing things elsewhere I fitted it with the 3/8" bearing guided cutter. Here it is.
Then I ran it over the edge of the breast hook, which now looked like this.
And here it is after being cleaned up.
That looks nice! I left it unrounded at the ends where it joins the sheerclamp. It looks good that way.