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That's the thing - how durable/long lived? 5 years? Ten years? 15? And then how do the two compare side by side over the same period of time? If the enhanced deteriorates sooner than the standard protected coatings, where is the gain?
With no one now in Australia offering a recoating service, I am not finding the necessary information to make an informed choice.
Apparent reflectivity differences means little if over time the performance is not there.
Half a wave coating, of which wavelength?
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