Originally posted by: SphinxnihpS
Originally posted by: SonnyDaze
Any good stain will work. But use a spar varnish with a high UV rating as a finishing topcoat. Should protect it from weather and sun.
Wrong. Will peel off after one season, and will be permanently sticky.
Varnish is made of natural compounds dissolved in linseed oil, and has very little weather resistance.
Oil-based polyurethane is generally manufactured and sold for indoor use items.
Water-based acryllic is the same, and even less durable.
UV additives are meant to protect the underlying color of the wood or stain, but generally weaken the finish itself.
I am telling you definitively that the ONLY topcoat that will withstand constant weather is going to be an epoxy type finish such as used on cars.
I'd stain it and leave it weather and stain it again as needed. Any finish that makes economic sense is not going to be durable. Sorry.