e-Minis and Wargames Alchemy have teamed up to bring you Model Back-Up paint remover.
From the release:
The Model Back-Up allows you to take the paint off your models quickly and easily. In less than 15 minutes with minimal Model Back-up miniature’ll look like as you end up removing it from the sprue.
It doesn’t have problems with any kind of paint or product: Metal, plastic or resin.