I went to Sherwin Willams and told the lady I wanted a good exterior latex. I thinned the first two coats to get an even color inside as well as outside. I agree it doesn't cover like oil based. I put a quart on the bottom alone. Launched yesterday and there were still some pin holes. I could see some water seeping in but I couldn't find a hole.

It's only been a few days but it doesn't appear to be has hard as enamel. I scratched on a rock. Of course that may change given another week. First impression are just so-so. I LOVE the easy clean up and not having to pay for solvents. Going to give it time of course but I not overly impressed so far.