This article describes the method I use to remove the paint from both metal and plastic minis without using Dettol.
I live in the United Kingdom, and have used Dettol, a cheap disinfectant used for sterilising cuts and kitchen worktops for years to strip my miniatures. The beauty of Dettol is it's not a solvent, and works simply by loosening the paint from the miniatures. This means that it will not melt or damage plastic parts, unlike other stripping chemicals, and of course its much better for the environment. It can also be used many times.
Unfortunately, Dettol isn't available worldwide, however there are alternatives available, such as
Fairy Power Spray
Just do a google search for alternatives in your country.