If the paint isn't a candy color a simple scuff & recoat should cover the current sins. Be sure to follow the manufacturer's instructions for cure time between coats.

We are all making the assumption that the "smokey" areas you refer to are the result of inconsistent metallic coverage. Painting when it's too humid can result in "blushing" where the paint skims over before the volatiles can escape. Posting a good pic of the affected area can aid the diagnosis.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.