Lot of the guys swear by Poorboys
. Great products and very good prices. Don't know condition of the paint or what tools you have.
But I would first wash. Then clay bar the whole vehicle, probably a lot of contaminants. Then a swirl remover on a PC, Followed by Poorboys
Black Hole Glaze on the PC. Lastly a polish or wax. Really hard to give you a definitive answer without seeing the vehicle and knowing what you have to work with.