PeterB,
The EN coating was a boo boo mistake on our part way back when. Not that I or anyone in the Skunks knows about optics...
We have pricing from a place we plan on getting more from.
The question that I'm tossing over and over and over is whether to get the inside polished (bare aluminum) or see if I can get it polished and sputtered aluminum and try to make a real reflector surface on the inside.
Here again, surface finishes is not my forte (??). And the only way to get a reasonable cost on them is to order a fair amount of them.
If I was just rolling in dough, I would probably just get both and see what comes of it.
I would like to ideally get the maximum light out and to not have a polished surface to break up and beam artifacts. That would be ideal. How to specify that and get what I want is what I don't know exactly how to call it out.