painting bottom

[Huron Blue]

I will be using it for the bottom as well as the topside. I'm not sure how well paint not intended for %100 water contact would hold up?? I really have no idea. A fiberglass hull flexes a bit too. I'm 50. I'm going with the $160 yuppie paint. ha I remember a saying something along the lines of, if your really happy with how something turned out even 10 years later you can't recall how much you spent. But if it screws up bad the first year you will always remember how much you 'saved'.