Permanizer is my absolute favorite exterior paint made. I have found nothing that can compete with its durability and coverage. There has to be some underlying problem to cause your problem. Permanizer is also a self-priming paint so you can skip the primer next time, I have raw wood on my own home that was painted with 2 coats of Permanizer that still looks great after 5 years.
My cost is in the 30's for all sheens, but I do by lots of it.
I will give credit to Duration for a better finished appearance though