Hey mate, i take it your new to detailing? You might want to consider having it professionally detailed.
Depending on the level of fade you will need something with a bit of cut.
Personally, i use sonus SFX-1, applied by hand with a polishing pad, but autoglym do a similar product, as do meguires.
http://www.cleanyourcar.co.uk/polishing/polish/sonus-sfx-1-restore-polish/prod_43.html
Before you start polishing though, you will need to wash and prep the paint, search on here for two bucket method washing, claying, polishing , waxing.
Here is my mums red J reg astra that i did with sonus and then auto glym super resin polish. No before shot sadly. You could try using super resin polish first, but it probably wont have enough bite, but its worth trying first.
It was pretty much pink when i started.