I don't know how to predict what I might want to do in the future.
Any processing loses something.
I would guess that head-on hits that impacted only a few pixels would be indistinguishable from stars or hot spots. Tom, if you want some work on this, you might reference some image portions which show what you believe to be cosmic ray tracks in Mark III or IV data, include a few pointers to the project you mentioned, and set up a simple Tech Note for reference. Again, thinking as I write, this kind of project might make use of CCD chips that have major defects. I think that the more uses we explore for original or semi-processed image data, the better.