Cool. If I don't find something like that locally, that would certainly be where I get it now.
My Macintosh SE is only slightly yellowed. (and the fluorescent light in my bedroom makes it appear a bit more yellow then it really is) So I would think mine would likely not "re-yellow" after a few years.
I've turned the lights off and used my LED flashlight to try and get a view of it in more natural lighting conditions. (opening up the windows is out of the question. I will do my best to baby this machine.
)
(even though it's almost 3pm, it still gets noticeably dark with the lights off. That's how well I got my windows blocked off.
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I have to look at the few nicks on the edges to see what the original color was (I had recently cleaned off some black markings and the plastic underneath was still original beige).
It's only gone a few light shades of yellow. So I would believe after retr0brighting it, it will remain beige as long as I take care of it. I have my bed room windows covered up with bedsheets (It's been like this for awhile as I have glare issues with my eyes) so the room is darker then normal. I would believe this also ends up helping protect my SE from unwanted UV exposure as well.
I live in Texas (Northern Texas, not southern Texas), so I don't think it's known for being very humid at all and the central AC of my house would also help keep humidity down.
My room does get a bit warmer then the rest of the house though. On average it gets about 80'F at peak summer heat if I keep the ceiling fan going. The rest of my family considers my room too hot, but I'm a bit cold natured. The temperatur swings in my room get a bit more extreme during the winter though. But I don't think it's something that will be harmful to my Macintosh in the long run.
In a month or two I may consider getting that. I may wait until I have an SE/30 before dropping $20+ on peroxide solution. I also don't have a clear bin to place the stuff in so it won't be cheap for me to do this currently.
The keyboard I am using with my SE is a bit more yellowed. I don't have a mouse yet. What condition my eventual SE/30 will be in will determine how soon I will attempt to get the stuff for this.