Interesting, I was unaware that new Tornado rods are "ridged" as you describe. If that's the case, you need to abrade metal, and the smooth, lubricated plastic that makes up the bearings is not going to be a very effective metal abrasive. The ridged rods, on the other hand, will be very effective at abrading the inside of your bearings. Have you noticed plastic dust being generated by the rod movement?
Smoothing metal is certainly possible, but the tricky part will be doing it uniformly so you don't generate flat spots. I think I would try some liquid automotive rubbing compound on a soft cloth, something like 3m Rubbing Compound. This is abrasive but it is a fine abrasive (>1200 grit) so may take some of the shine off of your rods. Try it on a small area first.