As the other guys have said though, the biggest contributor to the final finish is the prep, make sure the paint is clean, contamiant free and swirl free, and a good wax will make it look deeper and protect the paint from more contamination meaning next time around the whole process is easier.
I have used loads of different kits before (bar Adams) and Dodo Juice blows them all away. It seems to have made it to the US (
Dodo Juice USA ). If you can get Dodo where you are, I recommend Lime Prime (paint cleanser/polish), Supernatural (wax) and red mist (detailer/sealant).
This is what the above combo did to my 40th:
