On 10/3/2017 11:30 AM, Greg Guarino wrote:

Any idea how to either remove the rust or at least smooth it down enough
that the friction isn't in impediment to adjusting the table height?

Citric acid.
http://www.instructables.com/id/Remo...h-Citric-Acid/
https://www.youtube.com/results?sear...d+rust+removal