The car is slowly making its way to the East Coast. While waiting I needed something to do so I started tinkering with the extra set of grills I have for a 72. I used my tried and true plastic paint stripping method of soaking the parts in "purple stuff" degreaser. It is the best thing I have found for removing paint from plastic without harming the plastic.
Here is one of the grills outside the vat while the other one is soaking:
And the results after about a day of soaking, scrubbing gently with a plastic bristle brush and fine scotchbrite pad and then resoaking. Kind of like the "Lather, Rinse, Repeat" directions on your shampoo bottle.