I use SuperClean to strip paint, from styrene, resin and metal. It is not nearly as caustic as oven cleaner, though they both share an active ingredient-lye. Another advantage is that you can use a batch of SC over and over.
I use glass jars of various sizes and old glass backing dishes, to immerse parts. SC will dissolve the paint within minutes, though the longer you let the piece soak, the more that will dissolve into the solution. I let parts soak, then use an old toothbrush to gently scrub the paint away.
You could also brush on SC and let it dissolved paint in a particular spot. I have done this with figures, when I made a mistake and wanted to strip the paint, but not from the entire figure.
At eight bucks a gallon at WalMart, for a product that can be used over and over, it's hard to beat.
It also has household uses, since it's a de-greaser. I've used it on everything from grease stains in the laundry to unclogging drains.