those cracks look like the ones on my 2000 javelin renegade 19 and my neighbors 2000 stratos 19ss only ours are worse.they are just cosmetic but to me they are an eye sore on white boats.i know any boat can get them but i am kind of surprised to see them on your model skeeter.i am sure that is a high dollar boat.with you only having that boat 4 years i feel like skeeter should at least help you some way.some people say if you have them repaired they will come back.just goes to show all these boats are way over priced.good luck to you on whatever you decide to do