I wonder if what David Swasey - a camoufluer at Elco - said lends any credence to those assertions?
This is what Swasey said, " He also discussed something he referred to as one mission camouflage. Mr. Swasey said, “Among the latest, and as yet, untried schemes on the PTs, is the ‘one mission camouflage’ theory, or a special camouflage for a special job that can be taken off as readily as it can be put on. This consists of a certain type of water paint that be washed off upon the completion of the boat’s mission.”
He described what they would do for these schemes in the following manner; “The type and design of such a mantle has been mostly in the form of what we have called, ‘bowtwisters’ – painting the bow and fore-superstructure with a very neat black, embellished with one, or perhaps two areas of white to distort the course of the vessel, and to complicate its ap-parent maneuvering under searchlight. Always, only one side of the vessel should display any white, so that it is possible to turn a completely dark side toward the enemy when their lights have not yet picked up the approaching or retreating vessel. Just pure black is extremely helpful when the sky is filled with these wandering needles of illumination.” ...
Note the last sentence before telling me I'm stupid or wrong.