On Uncle Boo's recommendation I went and found a sample of the Azek product. I'm impressed. Took staples like a champ and holds them firmly. Very good cut-ability
and very light. A little pricey but much lighter and cheaper than star board or marine board, and it met all my tests. Durability? only time will tell, but if they are selling it as decking and house trim, it should prove solid for years to come. Good call.