This isn't really a wood question, but I figured this is the best place for varnish knowledge
A painter told me that Pratt & Lambert made the best spar varnish for my garage door. He claimed that it had the highest level of UV blockers. He must have been right, because that varnish outlasted others. The problem I am having is that it is hard to find in my area.
So, the question I have is: "are there any reports that rate Pratt & Lambert better than others?"