How to make vinyl interior plastics look like new?

[mycarmycar28582]

So I get the fact that you need a interior detailer which I have, but how else do I make the plastics if the interior (not just all plastics) look like new if they are a bit faded? My dad left his top down on a very sunny day & his interior kinda fried up.... Any suggestions? He has a 2001 Ford Mustang GT, only thing I could really think of is detailer & polish but what kind of polish? Thanks... I'dconsider fixing his cracked leather tan seats as well but It seems like quite a bit of work to do that, unless someone can recommend me a good way to fix that as well.

[PandaSauce]

I like 303

[AGOatemywallet]

Pictures Please