I thought I would pass on something that has worked very well for me to others who are considering building one of these great boats. As I have said many times, I'm sure your all tiered of hearing it. I am building my NE Dory on a very tight budget. One of the things that would have saved me a bit of cash, would have been to forgo power sanding. I found this out the hard way. I went out and bought a brand new sander, I needed one both of my old units were thrashed. I found an online source for bulk sanding pads. I ordered a set and after my 1st sanding session on my Dory realized I had not ordered nearly enough. So I made another order. When the time came to epoxy the inside of my Dory, I was picking up supply's at Home Depot and just on a whim I bought a sanding block. I had been using a homemade block. Just to use in the square places were you cant fit a round sander. Well it worked so well I stopped using the power sander. The hand block only uses a 10th of the paper and has been producing a much flatter surface. Yes I work up a sweat, but the results have been worth it. I just came in from my garage, I sanded the entire backside of my Dory in preparation for priming. It only took about half an hour, just 2 sheets of 120 grit paper. Here is the processes I used, I went over to whole surface of the boat very lightly with my cabinet scrapper. Then the whole boat with the hand block and 120 grit. Make sure you have your respirator on. That's the one drawback, no dust pickup. A bit of sweeping and cleaning, then a good wipe down with alcohol and I am ready to paint next weekend. Sorry for the long post, but as I said if I had read this before starting, I could have saved a nice chunk of change.