I have posted on here several times about the problems with some of the Timbertech fading issues.From my experience working on a crew that did warranty replacements this is what i can say for what i have saw and been told from one production line person in the factory and one claims representative. The desert bronze color seems to be the most affected by these white spots and molded areas. Two things have been said to have caused this. First one, the sun. It beats down on it and causes it to fade in high sun areas. From what i have been told this is due to an uv additive being formulated wrong, applied wrong or not enough of it. I dont know the specifics on it. I can just tell you what i was told. The other issue is the mold looking problem. I have been told that this is from a chemical burn from maybe spilling a petroleum product or cleaning a TT deck with a petroleum product. The way to rectify this problem is to collect all original invoices on your purchase, take pictures, and call TT and voice your problem.From the 50 or so decks i have replaced this is how it goes..First TT most of the time trys to offer Deck Max which from what i have been told only is a temporary fix, for six months or so. No one i have talk to says it is permanant fix. It is a sealer that is applied and makes it look brand new but in time it fades also. I can say that all TT fade and burn problems have been resolved in the plant and this is why i worked on the warranty replacement crew fixing these decks to rectify the decks fading. I would be happy to help anyone with installing their new deck for around five dollars a sq ft. maybe more or less depending on layout. If intersested or you have any questions please e mail at tsayre28@aol.com or e mail me a phone number and i would be happy to talk with you . Thankyou, Tylar