After filling all holes with epoxy you can realize that the surface is actually much more worse than you first thought it would be. The hull surface is full with spots – holes and humps. They must be filled up, and another sanding have to be done.
You can use softer filler mixed into epoxy for easier sanding, however, I have chosen hard ones because the mechanical properties fit better for the hull even if they are below more epoxy layers.
Sugar scoop structure
Rudder will be profiled below the hull. The top of the rudder will be made of 25X4 mm stainless steel A316 tube.