I happened to stumble upon this article and would like to offer a little more details.I can tell you that once you see just how easy it is to maintain this furniture you will understand why it is becoming so popular. The HDPE plastic that it is made of is impervious to all chemicals, so nothing will penetrate the plastic wood. This also makes it very easy to clean up. The color is embedded throughout the material as well, which will help in fading. On some of the vivid colors it is known that they may have some fading. This can be remedied by apply a UV protection. I read that they use powder coated stainless steel hardware as well that helps in the longevity of the item. I did a lot of research before buying our adirondack chairs and could not be happier.

I can guarantee that you will no longer be sanding or painting your furniture ever again. Just thought I would throw my two cents in here!

Here is a link that might be useful: Polywood Outdoor Furniture