ablative paint is the way to go! get the bottom clean so u could see any area that may need to be repaired. after proper repairs have been made i use barrier coat then apply a ablative bottom paint their are a couple of brands out. i use the interlux system FOLLOW THE COMPANY INSTRUCTION and u wont go wrong. i got 4 years of service in barnegat bay from inter protect first; followed by three coats of micron. HARD WORK EXPENSIVE but i did not have too deal with it until the fifth year by apply two more coats of just micron with bioux good for another 2/3 years all i did was power washed the bottom after removing the boat from the water every year!

Here's what I got outta this...moisture's been detected in the hull...no matter what you use or when you use it, an important aspect to this is to allow it to dry before you apply