[Arkcon]

I was wondering if any one has seen for sale something like I'm picturing.  You have some glassware, its clear, and you need it to be amber (low actinic.)  So you toss it and buy the correct glassware, or carry it down to the glassblowers and have them paint it with oxide and re-fire it.  Easy peasy.  But if you can't do that, some plastic sleeve that you melt onto the bottle would give you what you need, for a little while, until it wore off.  Something like that out there?

[Borek]

Never seen anything like that. Some airbrush coating perhaps?

[Ben Bob2]

I'm not sure how effective it would be in this application, but what about dipping the glassware "glass stain" sold by craft companies for painting windows?

[Arkcon]

Well that's the thing, it has to not just be brown, but actually "guaranteed" to whatever standard applies, that it will block the wavelengths it needs to block.  Back in the day, I'd seen some brown glassware peeling off the brown plastic layer.  But I only saw that once, so I'm guessing that style of amber lab glassware is out of style.