Soda blast or just scrape and paint

[step up here]

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!