Decided to fix the awful tail of the 2016 iso, according to Dk Peterman's instructions. Only difference was, I used balsa instead of foam. Going ok so far.
I have not done that model AND I use 2K on all repairs for other people....... but all matte white finish Starboards I've done a little repair on for myself, the matte white is verrryyyyy close to British Paints "Easy Spray Pint&Prime" flat white. Many can't be seen even with just a dodgy squirt and no attempt to blend.
I changed my mind about the cut outs halfway through the job. I had originally intended to leave the 1cm cut'out, but after discussing with a friend, the board's tendency to "crab" around the gybe, the decision was made to remove it completely.