Well, I'd first look at getting polishes that are compatible with each other (you can choose from Sonus SFX system -skip #1 though, or megs, menzerna, or 3m; include the mild paint cleaner with your choice of polishes). After you've whacked out the paint from all of the old accumulations from the previous year, and the paint is nice, streak free and wax free, you can decide whether you would like to add a sealant, and either a carnauba or a synthetic Last Step Product.
I go against the grain by not combining a sealant and carnauba lsp's, but you should do some investigating of your own. I have seen a lot of nice examples of finishes that were topped with a sealant right after the polish, and then finished off with a good carnauba. One other thing that I tend to do is not to mix different brands of a carnauba LSP. If you pick a carnauba lsp to start with , ie P21s, you should continue to use the same LSP until you feel like starting over. I wouldn't put a mothers or a megs or any other lsp on top of your first coatings of P21s (if you wanted to use a different wax, you should start over by re-cleaning and polishing). You are aiming for a true to the texture, deep layered look without the hint of clouding or incompatability. Or...at least this is what I think. Investigate, and experiment. Happy waxing.