A very common process for me is masking out my boom mic. A lot of the video producers I work with like to have a lot of headroom in their interview shots and I like to have high quality audio from my boom mic.
So my process is recording a few seconds without the mic in frame at the head of the interview, putting the boom in for the interview, exporting a jpg of the first frame out to photoshop and then masking in the area at the top that covers the mic, saving that psd and importing back to premiere to use as a cover for the boom. The few times I've forgotten to make the frame without the boom in, I will use content aware fill in photoshop.
This is a little labor intensive if I have multiple interview setups for a vox pop that's a quick turn. My feature request is a content aware fill feature inside of premiere, so I don't have to go throught this rigamarole.