Distortion at 200-600hz in Audition

I have recorded an audio book with a client using a Shure MV7 microphone. We recorded directly into Audition and both times, I've wound up with nasty distortion anywhere around the 200hz to 600hz area. It's difficult to describe but the man's voice sounds metallic. It's horrible. On the Spectral Frequency Display you can see the bright density of the yellow in those regions, and in the worst places, there are little dark patches (if you zoom in to the attachment you will see.)

Recordings were all done at a safe level. This particular audio book chapter peaked at -6DB in a couple of places. The bulk of it fell around the -12DB mark.

I couldn't pick up the distortions at the time of recording because unfortunately I was using a woofy old set of headphones after lending the good ones to the talent.

Currently for the edit, I am zooming in to EVERY little solid yellow or dark coloured patch, getting the paint brush, painting it over and reducing the level by 3 to 6 DB to lose the distortion. This obviously also has an impact on the general sound quality of the client's voice. It's also insanely labour-intensive: the attached screenshot is of just 1-second of audio, yet there are six distortions.

I have another six hours of audio to edit so as you can imagine, I'm feeling pretty shattered right now. Is there a way to safely fix this, as a batch? I've attached a screenshot and a very short audio sample.