So I know that there's been discussion about how best to strip the minis. And write ups have been done for both the MF and the A wing. But I couldn't find anything for an actual X wing, which seemed to me to be a different base plastic.
But thanks to Target's $12 core sets, I had an extra X wing that I could experiment on. I chose the poorest painted (and slightly distorted) X wing I had, and proceeded to attempt to strip it. I first put it in a bath of Simple Green. After about an hour, the wash had been stripped. But that's all that Simple Green did. I left it in for another 48 hours or so without any signs of progress. Even after scrubbing at it. But there was no damage to the mini.
Mini status after 48 hours in Simple Green. Notice the wash is gone.
So I decided to try brake fluid next. I didn't have the courage to put it in a bath, but it turns out that with just a bit of scrubbing, the paint came off just fine! And it didn't seem to damage the mini at all.
Mini after 20 minutes of light scrubbing with brake fluid.
I'm not too sure I'm happy with the end result - I might end up restripping and repainting it all, but here is the end result. I chose to paint the base color Reefer White, which is what ILM used for their models. It looks a little weird standing next to the beige X wings that I haven't repainted yet though.
End result. At least until I decide that to repaint it again.