If you zaino your car from another wax yes you have to use dawn. Polish serves a totally different purpose than dawn. Dawn is used to strip the wax, tar, bugs, etc. Polish simply cleans and removes swirls and light scratchs and the wax is used to add more depth and shine on top of that.TunerTL-S said:so if i polish my car, i dont need to dawn my car right? since they do the samething,,,clean off the existing wax?