A polarizer can
sometimes be used in both ways, to stop reflections and to accentuate them, a lot has to do with the angle of the reflected light an the characteristics of that light.
Yes, I doubt too that a polarizer was used, but I wouldn't have wanted to rule it out...
I wasn't there, I am just guessing and a polarizer could be a part of the trial and error section...
BTW, trial and error is sometimes the fun part of photography, particularly digital because no film is involved, and errors can so easily be deleted
.