My 71 Duster Project

I only shot that piss can stuff on there for now to identify the high and low spots to smooth out. Once I get this body all smooth, I plan to sand it all off and shoot the high build urethane gun primer. Correct me if I am wrong, but I thought that etching primer was for new metal that has never been treated? Yes, this has been taken down to bare metal, but it was treated with the last time it was painted so is it required again? Please let me know before I shoot the REAL primer. Thanks for looking out on that one!