(sorry for hijacking the thread)
Jack,
Yeah - two years is about it on the ink printed stuff if it's exposed constantly and we do have some concerns about the durability of the vinyl and print in a submerged environment. I have equipment with a thermal epoxy process that lends 5 year outdoor durability but the widest one piece printing I can do is 12" X 48" at 300 dpi or 11" x 36" at 600dpi.