I've used Micron Extra on our Pearson 26 since getting it in '03. I'm on the Potomac R. in fresh water. The first job (2 coats, 3 coats on bow & front of keel) lasted well from April 03 to August 05. It was ready for painting but did not look bad at all. We're about to haul again this month so we'll see how nearly 3 yrs. goes (couldn't get to it last yr. for various reasons, we're 27 mi. from the boat yard).