The outer edges of my factory-furnished RV-12 spars (circa 2012 issue) looked very rough and unfinished as well. When I asked Van's about this they told me that this was now the standard factory edge finish and was fine as shipped. The first years of RV-12 spars had nice smooth edges from the factory. Apparently the factory decided that it was cheaper to provide unfinished edges and they determined that this was satisfactory from an airworthiness perspective.
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David Heal - Windsor, CA (near Santa Rosa)
EAA #23982 (circa 1965) - EAA Technical Counselor and Flight Advisor; CFI - A&I
RV-12 E-LSA #120496 (SV w/ AP and ADS-B 2020) - N124DH flying since March 2014 - 940+ hours (as of September 2020)! 
V AF donation through June 2021.
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