theres lots of stuff out there other than meg's 3 step, although its a good OTS product. For a good off the shelf combo, pick yourself up some microfiber rags. The plusher the better, and the more the better. Then pick up some meg's scratch X. It will take a while but is you scratch x the whole car its gonna remove lots of scratches and swirls, and help clean up the paint. Then do 2 coats of Meg's Color X. This stuff is the 3 step in one bottle. it works good, and 2 coats will look great. Top that off with one coat of Meg's NXT, then wait 24 hours, and top that off with meg's #26. Stand back and be amazed.
So heres the steps:
Wash: Meguiar's Gold Class Shampoo
Clay: Claymagic/Mothers/Meguiars
Polish: Meguiar's Scratch X
Cleaner: Meguiars Color X
Sealant: Meguiar's NXT
Carnuabu: Meguiar's #26