I have just finished with most of the sanding on the outside of the hull. After planing down the edges of the strips I power-sanded with 80-grit paper on the random orbit sander. There is a bag to collect the dust, but it only catches about half of it. The rest ends up covering me and just about everything else in the garage. At least the plastic sheeting kept most of it off our neighbour's stuff. After sanding I could still see several gaps between the strips and I decided that I better fill them in with epoxy and cedar dust. Otherwise I could get air bubles under the fibreglass, which would be a disaster. So then I ended up sanding with the custom-made sanding blocks I put together (two blocks of plywood clamping together the edges of a sheet of sandpaper and tightened with a bolt and wingnut) and more power-sanding. Leaving on extra epoxy could cause the finish to look splotchy after I am done glassing so I had to balance getting off all of the extra epoxy and sanding the wood down too much.
Finally, after all of this I was able to wet-out the hull with a water-dampened cloth to raise the grain for final sanding. Wow, it has a great colour and the grain looks amazing! And the wet cedar smelled terrific. If I actually wore cologne I would want it to smell like that. Too bad the boat won't smell that way after it is encased in fibreglass and epoxy!