self etching primer indoor corrosion resistance

ive got a gallon of self-etch primer (napa brand by martin senour)that was reccommended to me by a body guy. i would now rather have the the epoxy but, i have already sprayed the door and trunk jams, as well as the engine bay in the self-etch stuff. it was 3 good coats on bare metal to seal it, but how long will it hold up until paint? i have been reading that primer will suck the moisture right out of the air, and i want to know if i am causing more work here. the car is inside and i am carefull not to touch anything already painted.