Completed step 1 page 21-15 – completed deburring and priming of the F-1275A, B, C, D, E, F- L fuselage corner skins. Completed step 2 – turned fuselage upside down on sawhorses then clecoed the F-1275A thru F – R fuselage corner skins to frame per Figure 2. Repeated with the F-1275A thru F – L fuselage corner skins to frame per Figure 2.