Reading posts about bottom sanding brought to mind a tip that has worked for us. My wife and I hand sanded the bottom of a 30 foot keel boat in preparation for barrier coating in about 5 hours. We used a 3 foot stick with a square end (to grip a rubber sanding pad) along with forked sticks of varying lengths. Holding the square end on the sanding pad and putting the fork at about midway, pushing down on the end of the stick puts an upward pressure on the sanding pad with easy muscle-friendly effort. Rocking the setup back and forth is intuitive with amazingly fast results. And the dust falls at the length of your arm and not on your head.
FWIW, Geohan
FWIW, Geohan