I want to import my knowledge about sharpening razor to my fly fishing hobby. I have taken the edge of my fillet knife to a almost shavable edge with my coticule but I am wondering if it is the right way to sharpen this kind of knife. Can an edge be too fine (or polish) to do the right job? Should I use a lower grit stone (at this point, the fish won't mind a less comfortable edge...)?

Tight line!