Thanks for all your replies,
The tracks are recorded completely seperatley and Isolated well! The take is great, I'm just being a perfectionist, I have automated the problem points but the nakedness of the duet performance leaves the volume drops noticable to me..
I have and did use a pop-shield!
I'm really after anyones tricks on smoothing with out over using compression and just general tips on getting an exposed Jazz vocal to sound great.
The tip on moving plosives to a different track was interesting, I'm going to try it out, many thanks for that Chico.