Used Sherwin williams duration on my Fiber cement when I added on/renovated in 2010. Probably repaint this year but it really doesn’t look bad yet. We use either Sherwin Williams or Benjamin Moore 99% of the time on our projects, mostly because of availability in our area.
IMHO, make sure it’s an acrylic latex. Sherwin williams Superpaint is their top of the line I believe and would be a great choice. I’m a GC though, not a painting contractor specifically.
