I may be doing something a bit "dangerous", but I've had no problems editing the wave files directly without exporting/importing.
I'm using Sonar 2.1, with the "per project" audio file storage, and I'm able to close Sonar, open Cool Edit Pro, open the audio file folder for the particular project, open the file for the track I want to work on, fix whatever it needs, save the file back in the same place, then close Cool Edit Pro and reopen Sonar. I've only done it a couple of times, but it has worked quite well for me. If I had a track with holes or edits in it, I'd probably bounce it to another track first -- but that seems to be quite a lot faster to do than the audio export function.
Anyone see problems in doing it this way? Am I asking for trouble?
Thanks,
-lee-