Best way to remove paint from metal without damaging?

[47_MasoN_47]

So I got a pretty rare find today, a Polish Vis 35 WWII era handgun. Problem is that someone spray painted it inside and out with automotive paint. Needless to say, the gun doesn't work and you can't even put it together. I got it for about 1/5 of what it's worth, so I'm not afraid to spend a little on supplies, but what would you guys recommend for stripping the paint off without damaging the steel underneath? I'm not sure if it's stainless or blued, but it looks to be stainless from what little of the metal I can see. The paint is definitely some sort of hardened enamel, my guess is automotive paint.