Primered car, needs fixing, and then what.

Little specks may be silicon contamination. Do they look like tiny little craters? Usually
Caused by contaminated surface not properly cleaned and degreased before coating.
Culprits can be greasy fingers, oil, anti freeze, wd40 or worst one of all Armorall.
Also contaminated air lines can drive you nuts.
Commonly referred to as silicon contamination and preventable only by careful surface prep and using a good precleaner and wiping dry with CLEAN rag or wipe and changingoften. Don't use one drying wipe for the whole area.
This problem can drive a painter to distraction till you find the culprit.