if you smoked for years and don't regularly exercise and hydrate you will definitely see that happening. regardless of quitting or not the damage is done and the consequences will always come. over years of smoking it is like you got a thick brush let it absorb in tartar and then just slathered it on your lungs and throat and continuously layered it after your body tried to dispense it from your body. you could always have some radical surgery to remove this thick tar but in the end you need to appreciate the disastrous effect smoking has on you.
should i expect to cough up a lot of grey black sputum the year or so after quitting smoking? . this didn't happen 'before' i quit. i smoked for years and years but had stopped at one point and later smoked so little that i didn't bother to quit until last year. . also i'm in hawai'i and we now have a great deal more 'vog' a volcanic haze than we had previously. and i am a medical marijuana smoker have been for years and that has not changed.