Yellowing plastic?
Question:I have white plastic that has yellowed. How does one make it white again?
Answers:
I don't believe you can. The yellowing you are talking about is a reaction within the plastic caused by exposure to UV rays, and ozone. You will just have to replace it. Is it safe to assume it is a light lens or something like that. If it is, you can get precut panels at Home Depot, or Lowe's. If you don't like the quality, or you can't find a big enough piece, you can always call on a local plastic supply company, and ask for clear prismatic plastic. Usually around 1/8" thick. It comes thicker, and thinner, but 1/8 works the best.
Good luck.
Stevo.
Not enough data. Plastic what? Indoors or out?
The yellowing is due to chemicals inside the plastic being broken down by ultraviolet light. The only way to make yellow plastic white again is to paint it.
you must replace it
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