In my personal experience,
and I am not a doctor by any means,
my answer would be no.
I have witnessed heavy smokers that smoked for 30 years stop.
At that time the damage to the lungs was so extensive that repairing the lungs was not possible through self healing.
While I am not advocating that you continue to smoke,
I also do not want to set the expectation that simply quitting will return your lungs to 100% condition.
I feel that this is not possible.
Smoking hazardous to your health,
thus the warning on the pacakge from the Surgeon General.