Bringing exterior plastic back to life?

Hi All
I was wondering what is the best product on the market to bring back the new look to all my exterior plastic. My bumpers have gone grey with what appears to be a white residue. I have previously used Back 2 Black, etc and it has only lasted a short time.
Maybe I need to remove all the muck with some sort of chemical before re-applying.
Many thanks
Richard

try baby oil

Baby oil, I dont think her in doors will be happy, trying to massage my freelander!!!

The best stuff is by Mequiars, its the plastic restorer in a red spray bottle.

Zippy

I read on another forum to use linseed oil, it is easy to apply and should deal with white residu of waxing etc.. don't know whether it will remove it permanently but as it is very low in price (won't use the word cheap) and easy to apply (just soak a lock with it and rub it in, no matter whether it is black or grey plastic, it all turns back to new look).
Good luck.

The best I have used is Autoglym plastic conditioner, 1 litre container. You won't be disappointed.