You could paint your tube in Aerogel bead filled paint which , besides insulating , is hydrophobic and fantastically expensive. You would need a lot of coats. But the paint is lightweight.
Quote:
Originally Posted by mura_gadi
The darker the colour the faster you will get dew, so white exterior if you can.
Remember your also insulating any remaining heat in the tube once in place, only way out now, is to dissipate heat via the ends of the tube...
Ps.
Be interesting to see if anyone has used hydrophobic paints on the dew shields as part of dew control.
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