Tom....If you can post some pics,some of the 'metal bumping' gurus may be able to offer some of their wisdom.
Unfortunately when metal dents,it also stretches so adding heat may add to the problem.
Sit tight someone will chime in soon!
Jock.
1950 Chevy Advance Design 3100 in Scotland In the Stovebolt Gallery More pix on Flickr. I've definately got this truck thing in my blood ... my DNA sequence has torque settings "Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.