You might be able to spot-strip certain areas, though it would be careful or fiddly work.
I would try using Castrol's SuperClean, which is a de-greaser, or SuperGreen, which works the same way, I am told. I have switched from over cleaner to SC for stripping paint from figures, and plastic models, too. For one thing, it is not nearly as caustic as oven cleaner, whose main ingredient is lye. For another, I can fill a jar with it as a bath, dip the figure in it, and then re-use the bath for another figure. Oven cleaner is once-and-done. And here in the States, you can get a gallon jug for around $8 at WalMart.
I would use a cotton swab, dip it in the SC/SG and apply it to the areas that you'd like to strip (I want to strip the face, it has such nicely sculpted detail, and the sporran, on that figure; the rest looks OK). Let it work for a couple of minutes--I've found that on metal figures, 20 to 30 minutes is a good time span (removing chrome and paint from styrene parts, it works much, much faster, as fast as 30 seconds. Then you can repaint the specific areas.
With gloss enamels, you might even get away with just painting over the areas you want to repaint.
Prost!
Brad