Depends what you are after Gaz.
The best one i like to use is megs endurance tyre gel. Lasts ages and gives a real glossy look. you can try and buff it with an old cloth to dull it slightly. What ver you do use some gloves or a old paint brush to apply cos it's a nightmare to get off your hands.
I have used TW nano tyre gel is ok but does tend to sling, even after buffing.
If you tell me what finish you are after i will try and recomend a product.
The below pic is after endurance has been applied
