Mainly for Biscuit...

https://www.everbritecoatingsuk.com/

The Wheel Guard looks like a good bet for the bodywork, although the basic Everbright and ProtectaClear many be just as suitable?
I've got a tin of the Satin ProtectaClear to test, as well as the Back For Good trim restorer...

And for cleaning, I'm trying this:
https://www.amazon.co.uk/dp/B00MMHXGI2/ref=pe_27063361_485629781_TE_item