The gloss black non metallic will probably have a thin clearcoat of lacquer, but will be very difficult to keep clean and shiny (it's the most difficult colour). So probably worth paying the extra for ...

I am buying a car and I have been quoted £370 for the dealer to apply Autoglym Lifeshine. I think this is too much but he won’t budge on the price. Is it worth the extra or can I buy this and apply it ...