Franck,
You can think what you like, but I have discussed he matter at length with ISAF and it's perfectly legal to paint the hulls after manufacture.
But that does not appear to be what the intent of the rule is. According to the rule, boats are to be manufactured with a gelcoat finish, paint is to be used as a repair/maintenace solution, not as a means to refinish the boat to gain an perceived advantage. (if you are so insistant that the boats be painted instead of gelcoat, other than a performance advantage, what could your motivation be)?
