Bill,
How is your Duration paint holding up? We are planning to put it on our 150 yr. old clapbopard house in northern Virginia. Our previous paint jobs with Sherwin Williams oil based paint have started peeling in 2 to 3 years. We are using a home made infrared paint remover (google it for instructions) to take it down to the wood. Do you think they were right about not needing a primer with Duration?