Thanks for your insight, Pat! I am not familiar with 'silver stain' ... what is it? This is a mail-order job, so I am relying on what the customer tells me they see. The yellowing is apparently very faint and more noticeable when placed next to a new commercial mirror or when brought outside into th...

I'm also looking into tinting the glass with paint (Pebeo Vitrail) rather than messing with the silver. I think this may be the best solution. The paint is waterproof and can be silvered over as usual.

I am wondering if there is a way to intentionally yellow chemical silver. I have a client who has an old gambling wheel that needs a replacement panel. The original panels have yellowed somewhat and they want the new one to match as close as possible. From what I gather, yellowing is the first step ...