Factory primer in 67?

Great info thank you so much it's greatly appreciated... with all that said I think I'll go ahead and take it all the way down to metal .... Stuff is tough to get off for sure , I'm using a 60 -80 paper on DA To get through heavy stuff and then going over the top of that with 150-180 grit .is this an ok finish for the metal before I spray my epoxy ?

The grit sequence is OK. There is no need for epoxy primer the body first but I strongly suggest wipe the car down with Metal Prep before you shoot the 2K urethane primer on.