In 20 years I have had to strip 2 models and used "Easy-Off " oven cleaner, which worked very well. Easy-Off will not harm styrene.
I now have a model painted with MM enamels and sealed with Testors dullcoat. The paint is totally cured BTW.
I tried the Easy-Off method (including waiting long enough for the EO to work, and scrubbing with an old toothbrush), to very frustrating results. Model is resistant to this. Paint really sticking in many places. I suspect because of the laquer dullcoat.
Any ideas that will not harm the styrene on a large expensive plane model?