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

[Dan.Kidger at quadrics.com]

On Thu, 5 Feb 2009, Gus Correa wrote:

> Dear Beowulfers
>
> A mundane question:
>
> What is the right lubricant for computer rack sliding rails?
> Silicone, paraffin, graphite, WD-40, machine oil, grease, other?

I wonder if NASA use Astroglide?