OK, is this thread still alive? I have the same white chalking and black spots on my Desert Bronze XLM deck installed a year ago. I just read all 10 pages of this post and it seems the only solutions left are the DeckMax Enhanced stain application or the Harvest Bronze and that the DeckMax Enhanced application is temporary (a few months) at best.
I have spoken to Christy from Timbertech and she said she will send a warranty package out to me and then I read all 10 pages of this blog and called back and got Roslyn from Timbertech customer service. I really pressed Roslyn on some of the issues and she is obviously trained to say these are "isolated incidents." I asked her if she would like me to send he a like to thi Bob Villa blog and she said she had no email. I said this is really important for you to know if you are in customer service so I would be happy to send to your personal email and she said she didn't have one. I mentioined we all know that is not true and she said she would google it and find it. This is a shame. I actually spoke to Christy BEFORE buying the Timbertech Desert Bronze XLM and she told me it fixed all the old problems.
I WILL push a class action lawsuit and get information out to everyone on this list to make it happen if there is not a SOLID RESOLUTION provided to this problem but before I do it has anyone had the Harvest Bronze used as a replacement deck and if so has it worked?
The other question is has the DeckMax Enhanced worked for anyone for at least a year time? It was hard to garner that information from this site because most said it was only temporary.
Let's stand together here! My pics attached.