Stickydashfix looks like a great product, johnnyg66 had great results.

 

You only have to do it once as long as you wipe the panels down with something like 303 Protectant once in a while. In other words don't let it get sun damage again.

 

I have been using 303 for a while now but the trim turns back to the chaulky white.... i have tried this on other panels also.
Will try and heating it and see if applying 303 afterwards helps. thanks

 

Hmmmm, then I wouldn't keep using 303. Be very very careful with the heat gun can't stress this enough, also do a test on the least visible area it might not work at all. Seeing that plastic seems to keep oxidizing (or whatever process is causing that) you may have to paint them with SEM Classic Coat.