Roundtable Host 2009
On something like that, try some penetrol. Some plastics tend to leach the oils over time and penetrol will probably remove that haze. I have used it on faded shutters to bring back the color and it the last time I looked at a shutter that was done with that, it was 6 months old and got direct sun from sunrise until about 3:30 pm. You can get it in the paint department in Lowes or Home Depot.
Penetrol or Flotrol?