Had a buddy wh owned a stripping/dipping biz here in Tacoma area.......as I remember from helping him some days........if it is a car you dont expect to keep very long......dip it. The main problem we ran into, is nomatter how well you thought you cleaned to solution out, you always had some that hid behind the welds, braces etc...........so unless you dipped it in a tank of etching primer with electrodes on body....forget about getting all solution out........then the rust comes back in those spots.