Ok, that is a short period of time and in a somewhat controlled environment, in this case I recommend using Eastwood After Blast Metal Prep or something similar. Its a basic prep that cleans and protects the metal giving a slight etching and phosphate oxide coating for the paint to grip to. I would not recommend epoxy if you are planning on doing the bodywork so soon after applying, you may not get the epoxy cure time needed (check the instructions) but I DO recommend you do a complete epoxy and seal after bodywork. The After Blast Etch will just give you some time you need between steps and prevent flash rust and fingerprint rust. I have only used it once and it seemed to work fine if you follow the instructions.
