[Gerry Zagorski]

First thing you will need to do is remove all the growth and then as mentioned above paint with metal primer and anti fouling paint.

Prep is the most important step for good paint adhesion, especially metal below with water line. Scrape off all excess growth you can with a puddy knife and then hit the area with On-Off and allow it to sit for a few minutes. You then can hit the area with a scrubbing pad to remove anything else left on. Make sure to scuff everything up good, remove all dust then prime and paint.