Self etch is old school, epoxy is the latest and greatest.
With that said, I have used self etch to put a real thin coat on top of bare metal to keep it from getting surface rust between weekends of working on it.

Last edited by sstock; 03/29/2019 3:22 AM.
1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
In the DITY Gallery
Video of the 261 running

1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration