[Beowulf] What is the right lubricant for computer rack sliding rails?

[Gus Correa]

Dear Beowulfers

A mundane question:

What is the right lubricant for computer rack sliding rails?
Silicone, paraffin, graphite, WD-40, machine oil, grease, other?

Thank you,
Gus Correa
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Gustavo Correa
Lamont-Doherty Earth Observatory - Columbia University
Palisades, NY, 10964-8000 - USA
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