Getting ready to bottom paint my 36' Roberts. Decided to pry off one of the outdated and monstrous drag producing transducer fairings. Many chisels and pry bars to overpower the incredibly tough 3M 5200. I eventually won the battle, drilled a new 2-3/8 hole for a tilted element ... flush mount Airmar B-60 transducer. Cleaned up the spot where the old fairing was and noticed that there appears to be no gel coat where the fairing was attached. Maybe it was glassed in at the time the hull was originally built ... anyway, my question is this: Do I have to gel coat this area .. or can I just go over it with bottom paint? I know there are some glass pros out there .. here's a couple of pics.