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

After sanding, a Scotch-Brite scrubbing pad was used to buff the min tube's exterior... (Click for enlarged view)

 

To produce a much smoother surface after hand sanding, I used a heavy duty Scotch-Brite™ scrubbing pad to buff the main tube's exterior. This produced a satiny smooth finish on the main tube.