Well theirs not really any tricks or secrets in reviving plastic. All I did is got a razor blade and carefully scratched all the white fluffy sun dried plastic and then got some wet and dry 400 grit sandpaper mixed up some soapy water and sanded for hours and hours. About 10 hours work in that one piece. Until I was happy enough with how it looked,then coated it with a coat of (or two) of clear. As sanding it takes shine of the new plastic look. So just needed to spend time of it.

Here for a good time,not a long time.