I recently installed 1500 sq. ft. of red cedar under a second story exterior deck. I want to use a durable clear finish that will not crack or fade over time unlike a verathane. The surface is all outdoors, but not directly exposed to the elements, or direct sunlight, so all it really deals with is humidity and temperature changes. As it is a ceiling, it is also not subject to any wear or traffic. I am just outside Toronto in Cambridge Ontario, therefore the winters are not terribly extreme. I am hoping to enhance the grain and help the wood retain its natural beauty and not weather too severely. Which of your products would you consider best for this type of project, bearing in mind I would prefer not to have to redo it frequently.