A couple of questions if I may.
I have a 17.5", a 1971 Cave 8", and a couple of 4.5" flats with Spectrum enhanced coatings done in 2006. The pinhole police say that it's time to start to think about re-coating at some point, and the spray silvering concept looks really interesting. I could share it with some other folks ( 25 inch, 18 inch) that also need to do some re-coating.
I live right on the ocean in Vancouver BC on the Wet Coast and the rolloff gets really humid some mornings. The 17 has a reptile heater pad behind, and an infrared heat bulb on the front, on timers, and they seem to keep the mirror dry in the mornings. The heat lamp trick worked at the DAO when they couldn't keep a coating on the 48".
I was wondering if there were any updates on the Midas "overcoat" protection.
As the spray process seems to require fresh air, or at least an open garage door, I was wondering if Rigid Collodion might work for the pre-cleaning process. Over the years I have used it on a bunch of mirrors, and stuff looks just like it came out of the coating chamber afterwords. The alcohol and ether would certainly de-grease the surface and the cellulose would entrap any particulates. It's nasty stuff but if it's outside with a breeze it's fine. I've never had any problems with it all coming off, just paint it on in thick layers and it evaporates so quickly the cooling effect causes the top layer to contract and I could just watch as it peeled itself off the mirror.
The movie SFX industry has a version that's cheaper than the medical/scientific grade that works well on optics.
Certainly If it ain't broke don't fix it, and the standard cleaning process seems to be great, but I was just wondering if anyone had given it a try.