Has anyone checked this coating company this out?
www.evaporatedcoatings.com/mirror-coatings/87-coatings/mirror-coatings/metal-mirror-coatings/108-glass-and-metal-substrates
This is US company and I've sent them an inquiry regarding prices, etc.
They claim 95% visual spectrum reflection for their Aluminum coating.
Apparently, they are using a multiple dielectric overcoat method:
cheville.okstate.edu/photonicslab/labratory_catalog/optics/mirrors/Metallic%20High-Reflection%20Coating.pdf
I wonder if this coating is appropriate for surfaces to high humidity, etc.?
We'll see what the price is, but it's probably too dear for one-off coating.