After stripping my 69 Mustang down to bare metal (except for under hood/deck and jams), I'm done with the body work...mostly small dings and dents using Dynatron putty-cote as final filler. I have rattle-canned the entire car with Eastwoods etching primer as it had to sit for a while. Now. I am ready to epoxy prime. Do I need to completely remove the etching primer? Local paint clerk said yes.