I'm basically trying to do a cleaning pass on all my music to remove all non-ID3 tags that might be present. I'm able to easily clear ID3 data from fields that I don't care about, but what about "hidden" or "custom" fields that you can't see? Maybe the user uses a DJ program that adds custom tags for something and you never even know they are there? How would you do a complete clean of these non-standard tags?
Now, I do know about the "Remove Tag" feature and the options associated with it. I've set MP3TAG to NOT remove ID3v1/2 tags when doing "Remove Tag" (I can do those in bulk myself manually) but from my experimentation with "Remove Tag" this doesn't remove custom or hidden non-ID3 fields.
Can someone give me some insight on the best methods for cleaning / clearing out all non-standard / ID3 data that might be hiding in MP3 files?