Same Problem on a 2000 460
Hunter does not allow the dealers to sand the bottom before applying bottom paint. Hunter recommended a no-sand primer which is silver gray in color and is manufactured by Interlux. The product requires almost immediate application of bottom paint after primer is applied. If not done properly, the bottom paint comes off is sheets. There may have also been an Interlux product problem. The only real solution was to sand off the primer, apply a barrier coat, and then repaint. That is what we did to protect the bottom warranty. I was fortunate that I identified the problem quickly. We took delivery of the boat in late October and pulled it out in Annapolis a few weeks later so Hunter, the yard and I shared the cost and I really wanted a barrier coat anyway. Don't sand the bottom until you talk to Hunter. I believe that if you sand lightly and not disturb the original gelcoat on the bottom and then repaint you will be fine. If you don't see the silver primer I mentioned but see the gelcoat instead, the factory probably did not degrease the bottom before applying the primer or paint. My problem was over the entire bottom, not just at the waterline.
