127mm f/9.4 OTA Construction - 127mm f/9.4 Objective Lens (retaining ring preparation)
 

The 127mm f/9.4 SurpluShed Objective cell retaining ring being sanded in preparation for primer and flat black paint... (Click for enlarged view)

 

Sanding to the lens retaining ring was also done to rough up the surface in preparation to paint it with gray primer, followed by several coats of KrylonŽ Camouflage ultra-flat black spray enamel.