I had a wood driftboat for a bunch of years and got really tired of the maintanence of Spar - and paint for that matter. So my most recent raft decking I used a deck restoration "paint" - didn't hold up well and I wouldn't do it again. Over time I've come to the conclusion that it all takes maintenance and I like the look of "varnish", so that's what I will do next. Might give the Ausi timber oil a go, I've been hearing more about it lately...
Whatever you do, just keep up with it and repair it as soon as it needs it. Don't wait or you'll have to refinish vs repair.
Yesterday's gone on down the river and you can't get it back. - Agustus McCrae