We have a garden bench that has cast something for the ends (with legs). The back and seat were wood. The wood, whatever it was, is completely rotted. I'd like to replace the wood slats and use the cast ends. But what kind of wood will survive sun, rain. etc. I'd like to avoid pressure-treated preserved wood. And of course, the finish; I've not had much luck with urethane even if it says it's made for exterior work.
The bench can be put into a gazebo for the winter.
You folks seem to know different woods very well; what you suggest?
Joe Ontario