Scale Fin Shaping Article

I wrote a how-to article on Shaping Nike Style Fin Tapers. 
It was just published in the Apogee Peak Of Flight Newsletter, #357 HERE

One of the difficulties in fin shaping is trying to gauge the knife edge thickness when tapering leading and trailing edges. The article explains how to blacken the fin edge for a better contrast. The blackened edge is removed after the fin is shaped.

In addition to Nike style fins this method can help when shaping the trailing edges of air foiled fins.