Fishing has been awful this year. I now only fish one day per week. Minnesota has made the daily limits unbearable. Had one of those moments yesterday that some people will never see. Caught my third small northern pike, about eight feet from the boat a huge muskie came up and grabbed the northern and took off. Fun to watch. Will try to experiment on the hull with dawn soap, and another area with mineral spirits, but mostly, I will use a velcro sander with a bag attachment and also wear a pro dust mask and start with 180 grit on the hull... I used 220 on the sides and it took four of them to do a small area so I switched to 180 to start with and that will work just fine... for the keel, I will use the gator tool which will take some time, but this winter, I will have lots of time.... After studying the reviews on what to use to keep the boat relatively shiny, I came to the conclusion after reading all the reviews (thanks Amazon) that there is no one item that is perfect.... on my Lund, I gave up.... and painted the hull that is below the waterline, black. That was three years ago and it still looks great.