This is related to the primary reason we never had our 2005 motorhome "buffed out". It has full body paint and is clearcoated. We wash it, and the finish still looks beautiful. Many of our friends who started having their motorhomes buffed and waxed each year, now HAVE to have it done, as the clearcoat has been damaged to the point where it quickly becomes dull/faded.
Some of those folks go the ZEP route, attempting to get away from the annual or semi-annual waxing exercise. My thoughts go towards the "If it's too good to be true, it probably isn't." line of thought...BUT...
As Capt Bill said above, who knows? Maybe this is the TANG of teak treatment