When getting off the subject of E-body door panels and stripping plastic parts of paint etc. you MUST keep in mind that all plastics are not created equally! We have ABS, Styrene, PVC, Polypropylene, Nylon, Butyrate, etc. in these cars and all are affected differently by various chemicals.

Some are virtually indestructible by chemicals (Polyethylene/Polypropylene) while others like Styrene will melt quite easily even from some of the milder chemicals.

So, you need to correctly identify the plastic material the part is made of before applying any chemicals.