not sure, those things are kind of inevitable in boats that are actually used. You will see pristine boats that people have because they just sit around and drink on the lake or tube or something. But generally people who wakeboard alot or tie up alot will get gel coat cracks at the points where the tower mounts or around the cleats.
Just deal with it IMO, if you really hate it you can pay to get it redone, probably a few hundred bucks. They wont spread very far.