For spot repair you can probably get by with going over the lacquer paint. But for a complete I would highly recommend stripping the lacquer off including all underlying paint. The lacquer paint over a factory baked enamel paint was common thirty years ago. Sometimes these paint jobs wood last the life of the car, usually fifteen to twenty years or so. Today's paints are urethane based, some of the base colors can and will react to the lacquer when sprayed over top. And when done you will have baked enamel, lacquer and then urethane enamel top cotes, not a durable paint job.
I think at this point a complete strip to bare metal is needed then build up with appropriate primers and paint. This will give the most durability and the only way paint manufacturers guaranty there paint thats what i was wondering that makes sense to me with my limited paint knowledge the laq still is in good cond. been in garage the 25yrs so no sun damage. just you know how durable laq. is so theres a few scratches from bikes & such.lol.
If an epoxy primer is used a self etching primer should not be used first. I actually prefer epoxy over self etching. I have found a industrial ppg epoxy that is scannable and works very well under body work and is $150 for two spayabel gallons.
I believe that its EP200 but I'll have to check. I've still got two gallons in a case.What PPG Epoxy is that?