Somewhat more than two hours sanding the starboard side from the bow to the depth sounder using the Bosch 3017DVS 5" random orbital sander and 60 grit Diablo 5" SandNet discs .

The Bosch 3017DVS 5" random orbital sander is toast. Overheating. Losing power. Time to replace it.

before today's sanding.
after today's sanding, before removing sanding dust.
after removing sanding dust.