First sanding

I now have two hulls with the bottom wood in place. The insides are all covered with epoxy although I may have to go back and address some of the larger voids since this East Systems epoxy does not flow well at all. This weekend I sanded (with Kevin's help) the outside of both hulls and now I am going to attempt to fill all the joints from the outside. I will be wetting down the surfaces with epoxy and then filling with a mixture of epoxy and micro-balloons. Very tedious of course but has to be done. I will also finish the ends where the two plywood sheets on the side come together. While I am waiting for these applications to cure, I will lay out and cut the tops. I am going to put a small opening (hatch cover) on each end so that I can remove any water that gets in, plus I can force air in one end and out the other to make sure the hulls get stored dry. I am wondering about putting any more hatch access closer to the mid section for storing small things....but I am worried about compromising the strength of the hull at the point where bending stresses will be the highest....
We used a combination of belt sander, palm sander, sanding belts cut to make a long 3-4 inch strip, and a frame that looked similar to a bow saw to hold belts. I'll put a picture of that in later.

Nice boots eh?