Hey Dave,
Your Lady Nelson is looking very good.
You may experiment with a light touching of the waterline edge with very fine, good quality sand paper to see if that removes the sharp edge that you see.
As others have stated, it has to be a very careful touch to not alter anything but the sharp point.
I have the same condition on a larger model with the sprayed on waterline stripe.
All I can hope for on mine is to reduce the sharp edge to a duller thick edge.
On custom auto paint jobs we would sand the edges as fine as possible and put multiple clear coats on for a smooth finish. Different times, different media, different paint.....LOL