Warpage

pomonamissel said
who told you that ? its a surface stretcher , how is that shrink metal . i have them , and it f...up the surface so bad there is no way to fix it nice , the metal is warped and needs to be put back in line not beat up . every panel gets stretched when it goes through the dies of the press , now you weld on it , it warps not stretches . some shrinkage along the weld , but no need for that aggressive hammer head . believe it or not you heat the metal then wet rag it to shrink metal , buts after you've worked it all out , so you can deal with the full areas . just how i've done it for years , tot by my father , he was a true metal man he never needed bondo .

Your father must have been a metal finisher back in the day when there was thicker better metal in the car bodies.

Pick and file was the technique they tought us in autobody school in 1974. Pick up the low spots with a pick hammer or a reach in pry pick pry bar, then file the metal to shape again. Sand, primer surfacer it and paint

They showed us lead filling too, just so we would know how to do it.

We all hit the ground running and went straight to the bondo and never looked back.
Got to give it to those old world craftmen that could do the metal finishing, no easy task.

I use my metal finishing skills for resurfacing old school aluminum slot wheels, make them look brand new again after 50 years.