chalky plastic panels

i know this is an old thread but if you are looking to remove the oxidation and bring the original color back to solid plastic parts, i scrub the loose flaky oxidation off and just heat with a heat gun almost to the point of becoming soft. the plastic brightens back up to about new. i have done this on kick panels and on a few faded 4 wheelers. just have to be careful to not over heat it and burn it.