What I am understanding is that metal work is a lost art on these old vehicles. I want a zero-fill truck but have quite a few dents. I cannot find someone in the area to do this for me so I am learning on my own. It is an art. I am super perfectionist to a fault, but also am really enjoying this skill set. I want to respect the original spot welds and make sure the slight waviness of the panels remains as close to OEM as possible. Getting the panel perfectly flat is very difficult and time consuming and not in keeping with what these looked like new. 90% of the straitening takes 10% of the time. The remaining 10% of straightening takes 90% of the time.
I bought and use the following:
Dollies and hammers at HF - door panel and body panel kit. Martin may make better tools, but they are much more expensive and I am not sure I would ever notice any difference.
H&S Stud welder: welds a steel pin to the metal which can then be pulled with a
lever or a slap hammer to pull a dent
H&S Dent Puller: This is a bit more rapid than the above, and excels at larger dents on bigger panels
Shrinking Disk: It heats high spots and then you spray water on it to rapidly cool the metal (shrink it)
MAP blowtorch: I would use an oxy/acetylene if I had it - be interesting to hear what others think.
MIG welder
Battery angle grinders with a 2" rol-lock adapter for small flap disk
Body panels from Real Steel and other OEM panels for patching really rough areas.
I read the metal bumping book. It is good for a 30 min read to get you started. It is also interesting to read a book about shaping metal before filler was ever used.
General sequence is:
Dolly and hammer at apex of dent wave to push the metal back to its original location.
Stud puller
Dollies and hammer to get the panel close to flat
Shrinking disk
Dollies with smooth crown hammer
Shrinking Disk
Dollies and shrinking hammer
Shrinking disk
Dollies and flap faced hammer
Shrinking disk.
Once that is done, I will place a primer and sand to identify and correct any high spots.