1968 SS Doors

I have met two guys who sent out some doors and bumpers to be chemically
milled. One of the fellas had a factory Hemi dart and the other a clone barracuda project.
I never got to see the parts first hand only their description of what they got back from
the dip tank.
Basically the parts come back as you would expect them to if they were submerged
in acid. Very rough and surface ate up requiring a lot of work before plating or paint.
They lost one pair of doors that didn't survive the process.
I have seen some nice original dart doors and they were unbelievably thin and completely orange surface rusted inside. Outside had good paint.
I had to get very close to see the thickness of the metal at the latch opening. The paint was
thicker than the steel. It seemed about the thickness of a playing card. The owner of the car was very careful with the handle and opening and closing of the latch. Seemed fragile
like it wouldn't take much to get a stress crack around a hinge or latch handle or mounting screws.
Of course I didn't touch the guys car he had on display but he was cool and enjoyed talking
about and showing his hemi dart.