If the t111 has been painted or stained with a solid body I would reccomend peel away paint stripper if that's the only option.
There are a few products out that will help restore the natural look, but I recommend cabot's problem solver. Then I would recommend a semi-trans...no, it has been done in a clear.however,some areas were not done last retreat, some have ben pressure washed unevenly leaving streaks, and some appears to have been treated over dirty siding. will a pressure wash get all this back to square one ya think??? I worry that their will be no uniformity?????
of course you need to wet everything down first, but that's just pressure washing 101any challenges with plants,windows,comp roofs in the use of theses products? i am bidding against two companies who just said wash it, retreat with oil base deck clear and I dont think it will look anywhere good at all in that direction, maybe shouldnt bid if I can't assure a good finished product