Okay, belt dressing . . . not sure about this one. And as for honey - while it sounds like a sweet solution, a sustainable
answer to this problem is what we need.
My current boss always tells me (pretty profoundly, I might add), that there are always two ways of doing something (and it's not the right way and the wrong way . . .).
Seems as though we're already barking up the two likely 'trees' however. The first being increasing the dimension of the drive belt and the second increasing the circumference of the drive wheel. Since the second 'tree' (the drive wheel) seemed like a better bet, I did contemplate applying/wrapping some kind of adhesive material (duct tape, etc.) around the drive wheel and then overlaying the drive belt - but the material never held up very well to the constant drive belt friction.
Would appear as though we need some kind of pliable material, which is sufficiently thin enough to fractionally
increase the diameter of the drive, and yet be able to adhere to the drive wheel metal surface, and have a sufficient tactile/rough surface for the drive belt to transfer torque - all without tearing up the intermediary material being used.
Nothing comes immediately to mind - but I think we'll leave this out there and an "open" question, since I've got to believe there's some kind of solution "out there" - that's firmly in the: old wives tale, urban legend, off-the-grid category.