There are only two anti fouling paint products that I ever recommend- Pettit Trinidad SR (hard) and Interlux Micron 66 (ablative.) These recommendations are based on my experience with them here in California and that being the case, I can't give you any useful information about how they would perform in your part of the world.
Owning a pleasure boat makes no financial sense at all. To me, owning a boat is a hobbie, a passion, an exercise of both mental and physical capabilities. I love working on them and sailing them. I enjoy the journey as much as the destination. And all along there is something new to learn or experience. I posted here about MYSTERY so that I might learn something more about her that I can share with all my family and friends that sail with me. And I will share what I learn here about her with all those I might meet during my future journeys on MYSTERY.
Are you in Kemah today? I was going to I have some friends come look at your boat as they are there looking at Sailboat’s today anyway, Sean 806-324-7220
I have a Gulfstar in Kemah at Watergate. I am also a qualified electrical tech. I will be in town in a couple of weeks if you want me to take a look and test them. I am always happy to meet and help a fellow Gulfstar owner. What marina are you in?