It's my recommendation that you wax the car bi-monthly with whatever you want like Blitz, #16, 3M Show Car paste or FinishKare Pink wax (those are some of the heavier waxes).
However, for ultimate wax protection, I recommend Collinite Insulator Wax or Collinite 476s Super Doublecoat.
http://www.caswellplating.com/aids/c...OVMTC=standard
Or if you have experience with the Klasse twins (All In One and Sealant Glaze), then I'd use them topped monthly with Collinite.
http://www.autopia-carcare.com/kus-kla-10.html
http://www.autopia-carcare.com/kus-kls-gla.html
That will provide excellent protection against acid rain and the salt in the winter.
If you have any boutique waxes like P21s,
Souveran or even Poorboys Nattys, you can layer those on top of what I mentioned for more pizazz in your shine.
Most products don't last in the NorthEast (I have tried them all with the exception of Zaino which also has awesome durability).