Cleaning Plastic Side Mouldings

[CHC (RIP)]

Been looking for a better product to clean and protect the plastic side mouldings.
The better product up to now is \'C4\', see link below:-

http://www.gtechniq.com/shop/3s-for-cars/exterior-coatings/c4-permanent-trim-restorer/

From what I\'ve read it is far superior to others and of course is more expensive - such a lot of money for so little.
Anybody had any experience with this at all?
Ta
Cliff