all of my sanding is going to be done by hand with a block and a low power palm sander intially.... I've gone over half the boat thus far with the block/palm sander and that has seemed to work fairly well for removing the old paint and junk after I scraped it clean. Then I'm using a semi stiff wire brush and some soft scrub to get the dirt and grit out of the little scratches. Next I plan on picking up some prep stuff to remove the silicone (as mentioned earlier) and any built up stuff and lay in the fillers and fiberglass. After the fiberglass is in there I'll attempt to feather it out and blend it to as level as possible without comprimising strength.
Does that sound like a good process/approach or am I missing something?