[htillman]

Teaks weathers gray as a way to protect itself. I would recommend using something such as Tip Top Teak or Teka to clean and then bleach the wood. Use scotchbrite to clean the louvers with the cleaner. Then sand to remove the "raised hair" and varnish. The first couple of coats will help build the surface. Another product to finish the door instead of varnish is Decks Ole.