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Any ideas on how to restore the original whiteness to this side panel?

ausman1000

ausman1000

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I would like to get the one on the left back to about the same whiteness as the one on the right. I am assuming the left panel has yellowed off due to UV exposure and I will have to remove a microscopic surface layer which would require wet sanding. I believe these particular Honda white panels are not painted but are a finished plastic surface.

Thanks

cover.jpg
 
I don't think I'd want to sand those. My first thought was that'll take a "museum grade restoration" using gentle solvents and a thousand cotton swabs.
 
I have used plastx polish on plastic to remove the surface oxidation for years with good results. Try it on the lower part of the cover first as a test.
 
if/else said:
I have used plastx polish on plastic to remove the surface oxidation for years with good results. Try it on the lower part of the cover first as a test.
Click to expand...

I have some of that, I'll give it a go. Thanks for the idea!
 
I have a Lego model of the Saturn V rocket that I had on display in a sunny room … turns out sunlight turns white legos yellowish.
According to what I read online, hydrogen peroxide will whiten things again.

I’ve not tried it yet, and I am sure the plastics are different, but might be something to try.
 
Interested to know the answer to this. We have a shower cubicle that is lined with white plastic. Before I installed it I left it outside in the garden for a year, usual story of other more interesting things to do, such as fiddle with little Hondas. Sunlight turned exposed areas yellowish, and no amount of bathroom cleaner will get it back to white, so if there is a magic solution I'd love to know.
 
In this link you can browse through a number of options:

https://becausemomsays.com/how-to-whiten-yellowed-plastic/

I've heard of the peroxide method before (it can indeed be used for yellowed lego bricks). You can find a (stronger) peroxide sollution in a (wholesale) store specialised in hairdressing supplies. The best and fastest effect will be achieved when you put the article (soaked in peroxide) in the sun (you can wrap your item in clingfim to prevent it for drying out). It will not stop the proces of yellowing, though, and the plastic will be turning yellow again in a given amount of time as it did before.
 
Rubicon said:
In this link you can browse through a number of options:

https://becausemomsays.com/how-to-whiten-yellowed-plastic/

I've heard of the peroxide method before (it can indeed be used for yellowed lego bricks). You can find a (stronger) peroxide sollution in a (wholesale) store specialised in hairdressing supplies. The best and fastest effect will be achieved when you put the article (soaked in peroxide) in the sun (you can wrap your item in clingfim to prevent it for drying out). It will not stop the proces of yellowing, though, and the plastic will be turning yellow again in a given amount of time as it did before.
Click to expand...
Cool, maybe we can use these tips for cleaning up the odometers.
 
I saw this video on the restoration of a Millenial Falcon Toy (1978) a while back and it shows how this person used peroxide to whiten plastic. I was reminded of it while reading this thread. Pretty cool.
https://youtu.be/_sdw5KyW454
 
ausman1000 said:
I have some of that, I'll give it a go. Thanks for the idea!
Click to expand...

Seems the PlastX works well but it does takes some elbow grease because the abrasive is so fine. It is a creamy liquid and I have used it with great success on plastic dial gauge lenses in the past.
 
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