This is a 1941 Plymouth that is to far gone...
Then I used a #49 Heavy Duty Oxidation Remover, the Meguiars marine line.
Here is a side by side rub out of the hood --
I had to go over each area two and three times at least. my wool pads loaded up quickly with dead paint.
Once I was down to the "good" paint I polished it with #85 using a #7006 foam pad.
And here is the result --
I then topped it with #21 when I was done.
I only used six wool pads, three 7006, and one 8006 pads....