tips for spraying primer

I dont understand what you mean by it shrinking still....solvent pop, as far as i understand, is bubbling due to not letting proper dry time between coats....if i have sanded down the primer so that I am actually exposing bare metal in some areas, i would think that i have taken the primer down far enough in order to avoid shrinking....and it has been over a month since the first time i have applied the primer (which was in warm weather) so i cant see how it hasnt dried...yes the best thing would to probably be to start over again, but i dont have the time or space to do that....I have already had a friend who is a bodyman and he even told me that if i swipe putty in the deeper areas and prime over it should be fine...i have been told by a couple of other body guys here as well the same thing....I do agree with what your saying no doubt, but im going to take the hopeful route and less time consuming one as well and hope that everything works out for the better....if anybody else has any tips for spraying primer, please share...also, if anybody has any actual experience with spraying over solvent pop, please share how you did it

thanks
Matthew