Any green screen exports? Keylight questions.

Been working on Keylight to get this musician into an old commercial. The two circles on the guitar are transparent holes that I was able to fill using Screen Despot Black, but when they disappear a bit of gray mask returns under the armpits (also circled) and a few other spots through the clip. Sort of a choose the lesser of two evils problem at the moment...or can I get rid of both?
I spent some time with Keylight tutorials and got it this much better, but not quite.
