Deburr and edge smooth all rudder and vertical stabiliser parts

Edge break and swivel tool all edges, followed by 240 grit, then 320 grit Vlies pad. Deburr all holes. Round and smooth all rib tab edges where there is an appreciable curvature, so as to reduce possibility of point contact between the rib corner and the skin, with consqequent stress injection into the latter and possible triggering of corrrosion.