yellowed plastic emblems

does anyone know of a way to clear yellowed plastic emblems.It seems to only be on the surface?

 

Progessively finer and finer sand paper, starting with 1200. Then, progressively finer rubbing compounds. Should clear it up quite a bit.

 

Motorcycle windshield polish for lexan (3M I think, avail boat or motorcycle shops) seems to work great for surface yellowing.

Kevin

 

I bought some headlight cleaner/polish on ebay once for some clouded plastic headlights on my wifes car.
It was a 3 step process and worked great.
I made sure to check the feedback before I picked a seller though.

I have used Lazer5000's method above too.
I used it for my clear Comet turn signal lenses.
After polishing I shot a little clear on the lenses.
Was a lot of work, but they turned out looking like new.

 

I'd be scared to touch them with any kind of sandpaper.

I had some plastic headlights here from an old Talon that were almost Cheeto-orange and I polished them with the same buffing compound I use on paint (Wizards Turbo Cut) and a rag, came out like new and wasn't hard at all. Wizards works good to clean rusty chrome too, doesn't scratch like steel wool. A 32oz bottle is like $18.

 

fine paper, then polishing compound like lazer said

 

Yeah- second that, too.
Plastic is basically the same stuff as paint- it can be sanded and buffed much like a modern acrylic urethane clearcoat-- just not that much difference between the two..