Here's a low-buck tool I made that would help out with removing your door skins, expecially on those you want to keep intact:


Probably one of the biggest challenges in taking things apart for repairs is doing so without inflicting more damage. It's hard to use an old part for a template if you mangle it beyond recognition during removal.

This is why you never throw away Vice grips that have the rounded off teeth that have just lost their bite, they are always good starts to a re-purposed tool.

The lower jaw is modified to receive the edge of the door skin...





Then a suitable "blade" is found, with plenty of material left over for replacements....








Some welding and grinding, and we have a new body tool.....











Starting at the corner, a diagonal slice is made in the inner panel so it will remove easier...





....and the tool is used to gently pry up on the flange of the tailgate skin.....