As is often the case it is better to cure this problem at the source by experimenting with different mic placements rather than compromising the audio quality by messing with the file in post production.
However it is difficult to advise what filtering you could apply without hearing the actual audio. Is it possible to post a sample somewhere, for instance Dropbox, for us to listen to. Unfortunately Adobe, in their wisdom, don't have an option for posting audio files in their audio forums!
Edit. Steve, snap once again!