[mental4astro (Alexander)]

Hi all,

I've been looking at some new mirrors, but I have come to a brick wall when it comes to understanding the difference in durability between quartz protected aluminium vs enhanced aluminium coatings.

What I also have not been able to find out is if enhanced coatings are overcoated or not. If not, why and does this affect the longevity of the coating?

Which mirror finish will last longer?

Of course here I need to assume two mirrors, both kept under the exact same conditions of use, clean and storage.

Thanks for looking,

Alex.