No primer war..but I'm all about priming
43 years in the aircraft overhaul and maintenance, mostly heavy jet, where there is no bare metal, period. I built my RV-4 with 100% prime from the beginning, all BAC spec 2 part fluid resistant green. Its impervious to near everything and almost impossible to remove. For the skin internal surface I overthinned it and rolled it on with a smooth foam roller. All the frames and such are sprayed. I even swabbed all the holes for bolts with Q-tips during assembly. I spent 10 years in the Boeing/Airline aging aircraft and corrosion protection steering group, so I became obsessed you might say. I'm also an AP/IA in he GA world an have seen my fair share of corrosion and bare innards..nothing against it in the right environment, I'm just a "primer advocate".