So I had some older X-Wing Minis that I'd painted when I was first learning how to paint. Wasn't really happy with them and decided to strip them this past week. (I stripped the Black & Red Squadron in this post .) I put them in a mixture of Windex/Simple Green and let them soak for six days. After six days paint removal was proving stubborn and I'd made frustratingly insignificant progress. The paint I applied was just Acrylic Citadel paints, no sealers or clear coating.
So, having listened to the internet and being rewarded with minimal success, I decided to apply my chemical knowledge to the situation. As a Chemist with access to a fully equipped environmental laboratory the options were endless. I certainly had the means available to strip the paint, as well as the means to dissolve the miniatures entirely. What ended up working brilliantly, and I though it worth sharing, was a mixture of 67% Isopropanol and 33% Methanol combined with a sonic cleaner. Within 20 minutes I'd not just stripped my paint job but also >95% of the FFG base paintjob I had originally painted over.
Here's the beast of a sonic cleaner:
I did use a toothbrush to clean the models, it was really just to push the paint off - it wasn't really attached anymore. But here's the 20 minute result (I pre-removed the wings):
As it would turnout, the TIE Punisher paintjob is made of tougher stuff. I let it soak and be cleaned simultaneously with my other models. Same solvent, same soak times, same sonic exposure, and same brushing yet the FFG paintjob remained. This was the only model I cleaned that retained its FFG paint, not a bother as I always just paint over it...but clearly an oddity.