I would just reiterate that I never sanded my ionics pole.
THe clamps, as I remember, had very little scope for adjustment in themsleves, so that any wear on the pole eventually got the better of the clamps.
The original clamps that come fitted on an Ionics pole lasts for ages.
When the clamps wear out and need replacing I've found the new replacement clamps do not have a big enough gap for adjusting the clamps so they only last a little while in comparison to the original clamps.
What I do to overcome this problem is either cut a larger gap between the clamp using a tiny hacksaw or use a very thin file to make the gap larger which allows the clamp to tighten up effectively even after a lot of constant adjusting / tightening.
Depends on what you mean by 'ages', needlesstosay.
I tried the old 'widening the gap' trick on mine, which I know in theory should work, but, and it's a big BUT, what you cannot do is
increase the scope for movement of the cam surface, and it's that that pinches the pole. The gap can be as big as you like, but if the cam does not compensate...
Maybe it's the cam that's wearing not the pole?
I guess we'll never know.