Restoring White Color to a Kenner Ecto-1 questions

Restoring White Color to a Kenner Ecto-1 questions
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Custom WorkstationOkay, as the title says, I picked up a Kenner Ecto-1 from The Real Ghostbusters line (it's actually the Ector-1A reprint that was done as a promotion for Ghostbusters II, which is the same body, just different stickers). Now, the Ecto-1 that I found had some stickers on it that came off really easy (almost as if they were barely hanging on). As a result, I came to realize that the body, as well as some of the windshield, has yellowed. At first I thought it may have been due to being in a house that belonged to a smoker, but I came to discover after some scrubbing the body clean a bit that it wasn't the case. So, the body has a bit of yellow and white spots where the stickers used to be.
So, I'm trying to find out if there's any way to restore the original color of the body without having to paint it (painting the actual body white will be my last resort method). Now, here are my questions:
1. Has anyone heard of Retrobright? And if so, has anyone used this method on a toy that was white like the Ecto-1 and what was the end result?
2. Is there any other methods of restoring color to a toy, other than painting, that anyone knows about? If so, what's their recommendations and how well does the end result come out?
3. Which method is best recommended?

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Posted by
CB2001 on Friday, February 24, 2012
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My dad has also suggested the possibility of using headlight polish from automotive stores to see if that could have any affect on it.
However, instead of the recipe in on the site, my dad used a mix of 3% Hydrogen Peroxide and Oxi Clean Gel Max Force Pre-Treater Gel Stick mixed together to do the job (I don't have the portions memorized, but I'll see if I can figure them out and post them if anyone wants them).
If there's any other methods that also come up, feel free to continue to post them. I'm trying to keep the car as much original as possible without going the paint method (again, painting is the last resort for me).
Edit: Top Notch Comix got mixed results when he used a knock-off brand, it took away the shine, but watshisface (formerly pock63) said he's never had that problem with the Mr. Clean brand.
Sounds like it's worth a shot, at the very least it won't put you on a government watchlist like buying enough hydrogen peroxide to soak the Ecto-1 would.