Using Marine wax on a car?

[geddy lee]

I have a 2009 Magnetic Black. I was using some detail spray to shine it up when my mail carrier came by and told me I should try using Marine wax . He said he uses on his car and the shine is unbelievable . He also said one applicatioin would llast a whole year because it has Teflon and some other ingredients in it that prevent the salt water from affecting the paint on boats.
Anyone ever try this on a car?