Keel coating
Wish I had photos, but didn't have a digital camera then. Mine didn't have any fiberglass on it when I got her. I removed the keel and had it sandblasted. I faired it out with lead. My first coat for primer was that zinc spray paint. At that time I could get it at the local hardware store, I believe West Marine and Boaters World still carry it for painting trailers. I then primed it with rustoleum red primer. I then applied 2 coats of flat rustoleum fallowed with 2 coats of rustoleum gloss. The flat enamel paints have better adherence, the gloss paints are more water proof. Covered that with VC tar and bottom paint. Did that 5 years ago, and it's still good. I have rebottom painted since, but that's normal. I think the barrier coat was the most important coating put on, but this has worked well for me. However, my boat sits in Lake Michigan for only about 20 weeks a year. Salt water would be much harder on the keel.