How long ago was the car painted as you will need to leave it a certain time before sealing to allow the solvents to fully cure, or so i am led to believe.

Other than that, what sort of budget are you looking to spend?

I have had good results with Dodo Juice £30 ones and have currently got some of the £95 supernatural but i also like to use the Collinite stuff (£15-20ish) on some cars as it is longer lasting.