Just tell him not to run a continuous bead. He should only run about 3/4" of bead and then let it cool down. I hit with with compressed air to expedite the cooling process.
If he runs it all at once he'll warp the frame/unibody. Just as a test (two years ago) I decided to see how long I could run that stick before the frame warped - it was a bad truck frame. I made about 1 1/2" before I heard a loud PING. That was all it took for it to warp.
Relax with the stick welding. I've repaired many frames that way and never had a problem. Of course, when I was doing my own I only ran 1/2" at a time. Now I MIG weld them.
