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Old 27-04-2019, 07:51 AM
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mental4astro (Alexander)
kids+wife+scopes=happyman

mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 4,979
Steve,

Thanks for sharing your invaluable experience with this stuff.

As suggested, the most obvious application of Black 3.0 & 2.0 is tje i side of an OTA. Unlike your experience with the walking stick, the i side of an OTA is not readily handled, nor typically bare metal.

The greatest challenge is to find the best undercoat for it - will it play nice with an existing black painted tube interior? And if the OTA is an open one, how will it deal with dew? And sometimes our gear can get warm (inside a var pr a tin shed), and then get very cold, so will this paint maintain its adhesion to the stuff it's been painted onto?

These two Black paints are designed for artistic purposes. They are not expressly formulated for astro applications. Their website desvribes the formulation requirements, and being waterproof or able to adhere to different painted surfaces are not priorities. To satisfy these as well would very likely fundamentally alter the "blackness" due to the change in binders.

Paint technology is fascinating stuff! In the same way oils-ain't-oils, paints-ain't-paints. It means the right tool for the job.

So, who's brave enough to guinea pig a scope?...

Alex.
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