Fixed via brute-force....

Not fixed; apparently my hack also mangles the texture for the base mesh.
Will go at it with a bit more finesse and try and get only the fairing panels with the texture update.

Apparently I was recursing from the transform for the ModuleProceduralFairings; which would be the Part transform... whoops. So it would catch any parts that were children of the fairing part.

Now am recursing from the individual panel game-objects upwards; should properly set only the fairing panel textures now.