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The mkiv Supra Owners Club

how do you stop head light yellowing?


jackso11
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My first sup didn't have yellow lights at all and they have never yellowed, but my new sup has yellowed lights.

 

I will refurb them, but how do I stop them yellowing again? I read posts on here that peoples lights yellow in months! mine didn't in 4 years before.

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I took mine apart and T-cut inside and out and then polished them before putting them back together. Lasted about 6 weeks before they started to go yelllow again. I think you need to do something more permanent like using laquer. I expect someone will be along shortly with something more useful.

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The yellowing is because they have been exposed to a lot of and/or strong sunlight.

 

The plastic ones on y ol Supra were once mistaken for glass, as it had clearly been garaged before I had ti brought to the UK and I garaged it whilst I owned it as well: it hardly ever saw sunlight, let along strong/lots of sunlight.

 

If* you can clean up the ones you've got, the chances are they'll stay clean. :)

* = bare in mind the yellowing will affect both sides of the plastic - the outside is easy to get too... the inside requires more effort!

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If you look at modern plastic lights there's a slight rainbow effect on the surface when looked at from an angle. I believe that this is some sort of UV protection, I don't think that the Supra lights had this on from new and even if they did then polishing the plastic would have removed the protection.

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