127mm f/9.4 OTA Construction - OTA Main Tube Cleaning (sanding)

Now that the objective and focuser have been carefully aligned to the main tube, everything had to come off in preparation for finishing. With all components removed, the first step was to hand sand the exterior of  the main tube along its length with 220-grit sand paper. This removed all of the major scratches and gave the tube a brushed finish appearance.