Silly Question about a 55 bonnet.

[Rude Dude]

Heat is the culprit improper curves on the hood or bonet as you guys down under call. Causes could have been by a fire, sanding with a grinder over heating the metal, or too aggresive sand blasting causes the metal to heat causing a tin can effect meaning the stamp curve will sometimes sag. There are ways to fix by using heat with a torch and cold rags soaked in a bucket with ice or working it with a shrinking disc and air. Heating the molecules of the metal and bringing strength back to the out of shape areas. Most good metal men can fix it just takes that special skill.