That "wind scar" looks like infill showing through. Did you have infill turned on? Hopefully you haven't re-sliced yet and you can go to the gcode view in cura and see if where the infill touches the edge matches the "scar".
You can probably fix this by setting your wall thickness thicker. So if you are at .4 go to .8. If at .8 go to 1.2. The latest Cura has a bug (a feature?, an issue?) where the infill can stick out through the wall. I have another post showing what's different in the new infill:
That post was a week ago when Daid wasn't posting much so he might not have read it.
I'm not convinced that this is a fan problem. I think it's more to do with the model geometry. I've printed several things lately with 0.06mm layer heights with absolutely perfect results all around.
What wall thickness and infill settings are you using, and what speed are you printing at?
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