There was no underlying paint underneath the markings I wanted to remove and it was only about a one inch area.
So I just went ahead and sanded the area very very lightly for a period of time with different grits of my sanding sticks for plastic models.
Absolutely did the trick and the plastic buffed back to it’s original sheen. You could never tell anything was painted on it so I will call it a success.
However, I’m going to order some of the Testors Easy Lift Off as that sounds like good stuff to have in the tool bag!
Thanks to everyone for the ideas!